1	// SPDX-License-Identifier: GPL-2.0-only
2	/*
3	* Copyright 2002-2005, Instant802 Networks, Inc.
4	* Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5	* Copyright 2013-2014 Intel Mobile Communications GmbH
6	* Copyright (C) 2015 - 2017 Intel Deutschland GmbH
7	* Copyright (C) 2018-2023 Intel Corporation
8	*/
9
10	#include <linux/module.h>
11	#include <linux/init.h>
12	#include <linux/etherdevice.h>
13	#include <linux/netdevice.h>
14	#include <linux/types.h>
15	#include <linux/slab.h>
16	#include <linux/skbuff.h>
17	#include <linux/if_arp.h>
18	#include <linux/timer.h>
19	#include <linux/rtnetlink.h>
20
21	#include <net/codel.h>
22	#include <net/mac80211.h>
23	#include "ieee80211_i.h"
24	#include "driver-ops.h"
25	#include "rate.h"
26	#include "sta_info.h"
27	#include "debugfs_sta.h"
28	#include "mesh.h"
29	#include "wme.h"
30
31	/**
32	* DOC: STA information lifetime rules
33	*
34	* STA info structures (&struct sta_info) are managed in a hash table
35	* for faster lookup and a list for iteration. They are managed using
36	* RCU, i.e. access to the list and hash table is protected by RCU.
37	*
38	* Upon allocating a STA info structure with sta_info_alloc(), the caller
39	* owns that structure. It must then insert it into the hash table using
40	* either sta_info_insert() or sta_info_insert_rcu(); only in the latter
41	* case (which acquires an rcu read section but must not be called from
42	* within one) will the pointer still be valid after the call. Note that
43	* the caller may not do much with the STA info before inserting it, in
44	* particular, it may not start any mesh peer link management or add
45	* encryption keys.
46	*
47	* When the insertion fails (sta_info_insert()) returns non-zero), the
48	* structure will have been freed by sta_info_insert()!
49	*
50	* Station entries are added by mac80211 when you establish a link with a
51	* peer. This means different things for the different type of interfaces
52	* we support. For a regular station this mean we add the AP sta when we
53	* receive an association response from the AP. For IBSS this occurs when
54	* get to know about a peer on the same IBSS. For WDS we add the sta for
55	* the peer immediately upon device open. When using AP mode we add stations
56	* for each respective station upon request from userspace through nl80211.
57	*
58	* In order to remove a STA info structure, various sta_info_destroy_*()
59	* calls are available.
60	*
61	* There is no concept of ownership on a STA entry, each structure is
62	* owned by the global hash table/list until it is removed. All users of
63	* the structure need to be RCU protected so that the structure won't be
64	* freed before they are done using it.
65	*/
66
67	struct sta_link_alloc {
68	struct link_sta_info info;
69	struct ieee80211_link_sta sta;
70	struct rcu_head rcu_head;
71	};
72
73	static const struct rhashtable_params sta_rht_params = {
74	.nelem_hint = 3, /* start small */
75	.automatic_shrinking = true,
76	.head_offset = offsetof(struct sta_info, hash_node),
77	.key_offset = offsetof(struct sta_info, addr),
78	.key_len = ETH_ALEN,
79	.max_size = CONFIG_MAC80211_STA_HASH_MAX_SIZE,
80	};
81
82	static const struct rhashtable_params link_sta_rht_params = {
83	.nelem_hint = 3, /* start small */
84	.automatic_shrinking = true,
85	.head_offset = offsetof(struct link_sta_info, link_hash_node),
86	.key_offset = offsetof(struct link_sta_info, addr),
87	.key_len = ETH_ALEN,
88	.max_size = CONFIG_MAC80211_STA_HASH_MAX_SIZE,
89	};
90
91	static int sta_info_hash_del(struct ieee80211_local *local,
92	struct sta_info *sta)
93	{
94	return rhltable_remove(hlt: &local->sta_hash, list: &sta->hash_node,
95	params: sta_rht_params);
96	}
97
98	static int link_sta_info_hash_add(struct ieee80211_local *local,
99	struct link_sta_info *link_sta)
100	{
101	lockdep_assert_wiphy(local->hw.wiphy);
102
103	return rhltable_insert(hlt: &local->link_sta_hash,
104	list: &link_sta->link_hash_node, params: link_sta_rht_params);
105	}
106
107	static int link_sta_info_hash_del(struct ieee80211_local *local,
108	struct link_sta_info *link_sta)
109	{
110	lockdep_assert_wiphy(local->hw.wiphy);
111
112	return rhltable_remove(hlt: &local->link_sta_hash,
113	list: &link_sta->link_hash_node, params: link_sta_rht_params);
114	}
115
116	void ieee80211_purge_sta_txqs(struct sta_info *sta)
117	{
118	struct ieee80211_local *local = sta->sdata->local;
119	int i;
120
121	for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
122	struct txq_info *txqi;
123
124	if (!sta->sta.txq[i])
125	continue;
126
127	txqi = to_txq_info(txq: sta->sta.txq[i]);
128
129	ieee80211_txq_purge(local, txqi);
130	}
131	}
132
133	static void __cleanup_single_sta(struct sta_info *sta)
134	{
135	int ac, i;
136	struct tid_ampdu_tx *tid_tx;
137	struct ieee80211_sub_if_data *sdata = sta->sdata;
138	struct ieee80211_local *local = sdata->local;
139	struct ps_data *ps;
140
141	if (test_sta_flag(sta, flag: WLAN_STA_PS_STA) ||
142	test_sta_flag(sta, flag: WLAN_STA_PS_DRIVER) ||
143	test_sta_flag(sta, flag: WLAN_STA_PS_DELIVER)) {
144	if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
145	sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
146	ps = &sdata->bss->ps;
147	else if (ieee80211_vif_is_mesh(vif: &sdata->vif))
148	ps = &sdata->u.mesh.ps;
149	else
150	return;
151
152	clear_sta_flag(sta, flag: WLAN_STA_PS_STA);
153	clear_sta_flag(sta, flag: WLAN_STA_PS_DRIVER);
154	clear_sta_flag(sta, flag: WLAN_STA_PS_DELIVER);
155
156	atomic_dec(v: &ps->num_sta_ps);
157	}
158
159	ieee80211_purge_sta_txqs(sta);
160
161	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
162	local->total_ps_buffered -= skb_queue_len(list_: &sta->ps_tx_buf[ac]);
163	ieee80211_purge_tx_queue(hw: &local->hw, skbs: &sta->ps_tx_buf[ac]);
164	ieee80211_purge_tx_queue(hw: &local->hw, skbs: &sta->tx_filtered[ac]);
165	}
166
167	if (ieee80211_vif_is_mesh(vif: &sdata->vif))
168	mesh_sta_cleanup(sta);
169
170	cancel_work_sync(work: &sta->drv_deliver_wk);
171
172	/*
173	* Destroy aggregation state here. It would be nice to wait for the
174	* driver to finish aggregation stop and then clean up, but for now
175	* drivers have to handle aggregation stop being requested, followed
176	* directly by station destruction.
177	*/
178	for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
179	kfree(objp: sta->ampdu_mlme.tid_start_tx[i]);
180	tid_tx = rcu_dereference_raw(sta->ampdu_mlme.tid_tx[i]);
181	if (!tid_tx)
182	continue;
183	ieee80211_purge_tx_queue(hw: &local->hw, skbs: &tid_tx->pending);
184	kfree(objp: tid_tx);
185	}
186	}
187
188	static void cleanup_single_sta(struct sta_info *sta)
189	{
190	struct ieee80211_sub_if_data *sdata = sta->sdata;
191	struct ieee80211_local *local = sdata->local;
192
193	__cleanup_single_sta(sta);
194	sta_info_free(local, sta);
195	}
196
197	struct rhlist_head *sta_info_hash_lookup(struct ieee80211_local *local,
198	const u8 *addr)
199	{
200	return rhltable_lookup(hlt: &local->sta_hash, key: addr, params: sta_rht_params);
201	}
202
203	/* protected by RCU */
204	struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata,
205	const u8 *addr)
206	{
207	struct ieee80211_local *local = sdata->local;
208	struct rhlist_head *tmp;
209	struct sta_info *sta;
210
211	rcu_read_lock();
212	for_each_sta_info(local, addr, sta, tmp) {
213	if (sta->sdata == sdata) {
214	rcu_read_unlock();
215	/* this is safe as the caller must already hold
216	* another rcu read section or the mutex
217	*/
218	return sta;
219	}
220	}
221	rcu_read_unlock();
222	return NULL;
223	}
224
225	/*
226	* Get sta info either from the specified interface
227	* or from one of its vlans
228	*/
229	struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata,
230	const u8 *addr)
231	{
232	struct ieee80211_local *local = sdata->local;
233	struct rhlist_head *tmp;
234	struct sta_info *sta;
235
236	rcu_read_lock();
237	for_each_sta_info(local, addr, sta, tmp) {
238	if (sta->sdata == sdata ||
239	(sta->sdata->bss && sta->sdata->bss == sdata->bss)) {
240	rcu_read_unlock();
241	/* this is safe as the caller must already hold
242	* another rcu read section or the mutex
243	*/
244	return sta;
245	}
246	}
247	rcu_read_unlock();
248	return NULL;
249	}
250
251	struct rhlist_head *link_sta_info_hash_lookup(struct ieee80211_local *local,
252	const u8 *addr)
253	{
254	return rhltable_lookup(hlt: &local->link_sta_hash, key: addr,
255	params: link_sta_rht_params);
256	}
257
258	struct link_sta_info *
259	link_sta_info_get_bss(struct ieee80211_sub_if_data *sdata, const u8 *addr)
260	{
261	struct ieee80211_local *local = sdata->local;
262	struct rhlist_head *tmp;
263	struct link_sta_info *link_sta;
264
265	rcu_read_lock();
266	for_each_link_sta_info(local, addr, link_sta, tmp) {
267	struct sta_info *sta = link_sta->sta;
268
269	if (sta->sdata == sdata ||
270	(sta->sdata->bss && sta->sdata->bss == sdata->bss)) {
271	rcu_read_unlock();
272	/* this is safe as the caller must already hold
273	* another rcu read section or the mutex
274	*/
275	return link_sta;
276	}
277	}
278	rcu_read_unlock();
279	return NULL;
280	}
281
282	struct ieee80211_sta *
283	ieee80211_find_sta_by_link_addrs(struct ieee80211_hw *hw,
284	const u8 *addr,
285	const u8 *localaddr,
286	unsigned int *link_id)
287	{
288	struct ieee80211_local *local = hw_to_local(hw);
289	struct link_sta_info *link_sta;
290	struct rhlist_head *tmp;
291
292	for_each_link_sta_info(local, addr, link_sta, tmp) {
293	struct sta_info *sta = link_sta->sta;
294	struct ieee80211_link_data *link;
295	u8 _link_id = link_sta->link_id;
296
297	if (!localaddr) {
298	if (link_id)
299	*link_id = _link_id;
300	return &sta->sta;
301	}
302
303	link = rcu_dereference(sta->sdata->link[_link_id]);
304	if (!link)
305	continue;
306
307	if (memcmp(p: link->conf->addr, q: localaddr, ETH_ALEN))
308	continue;
309
310	if (link_id)
311	*link_id = _link_id;
312	return &sta->sta;
313	}
314
315	return NULL;
316	}
317	EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_link_addrs);
318
319	struct sta_info *sta_info_get_by_addrs(struct ieee80211_local *local,
320	const u8 *sta_addr, const u8 *vif_addr)
321	{
322	struct rhlist_head *tmp;
323	struct sta_info *sta;
324
325	for_each_sta_info(local, sta_addr, sta, tmp) {
326	if (ether_addr_equal(addr1: vif_addr, addr2: sta->sdata->vif.addr))
327	return sta;
328	}
329
330	return NULL;
331	}
332
333	struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata,
334	int idx)
335	{
336	struct ieee80211_local *local = sdata->local;
337	struct sta_info *sta;
338	int i = 0;
339
340	list_for_each_entry_rcu(sta, &local->sta_list, list,
341	lockdep_is_held(&local->hw.wiphy->mtx)) {
342	if (sdata != sta->sdata)
343	continue;
344	if (i < idx) {
345	++i;
346	continue;
347	}
348	return sta;
349	}
350
351	return NULL;
352	}
353
354	static void sta_info_free_link(struct link_sta_info *link_sta)
355	{
356	free_percpu(pdata: link_sta->pcpu_rx_stats);
357	}
358
359	static void sta_remove_link(struct sta_info *sta, unsigned int link_id,
360	bool unhash)
361	{
362	struct sta_link_alloc *alloc = NULL;
363	struct link_sta_info *link_sta;
364
365	lockdep_assert_wiphy(sta->local->hw.wiphy);
366
367	link_sta = rcu_access_pointer(sta->link[link_id]);
368	if (WARN_ON(!link_sta))
369	return;
370
371	if (unhash)
372	link_sta_info_hash_del(local: sta->local, link_sta);
373
374	if (test_sta_flag(sta, flag: WLAN_STA_INSERTED))
375	ieee80211_link_sta_debugfs_remove(link_sta);
376
377	if (link_sta != &sta->deflink)
378	alloc = container_of(link_sta, typeof(*alloc), info);
379
380	sta->sta.valid_links &= ~BIT(link_id);
381	RCU_INIT_POINTER(sta->link[link_id], NULL);
382	RCU_INIT_POINTER(sta->sta.link[link_id], NULL);
383	if (alloc) {
384	sta_info_free_link(link_sta: &alloc->info);
385	kfree_rcu(alloc, rcu_head);
386	}
387
388	ieee80211_sta_recalc_aggregates(pubsta: &sta->sta);
389	}
390
391	/**
392	* sta_info_free - free STA
393	*
394	* @local: pointer to the global information
395	* @sta: STA info to free
396	*
397	* This function must undo everything done by sta_info_alloc()
398	* that may happen before sta_info_insert(). It may only be
399	* called when sta_info_insert() has not been attempted (and
400	* if that fails, the station is freed anyway.)
401	*/
402	void sta_info_free(struct ieee80211_local *local, struct sta_info *sta)
403	{
404	int i;
405
406	for (i = 0; i < ARRAY_SIZE(sta->link); i++) {
407	if (!(sta->sta.valid_links & BIT(i)))
408	continue;
409
410	sta_remove_link(sta, link_id: i, unhash: false);
411	}
412
413	/*
414	* If we had used sta_info_pre_move_state() then we might not
415	* have gone through the state transitions down again, so do
416	* it here now (and warn if it's inserted).
417	*
418	* This will clear state such as fast TX/RX that may have been
419	* allocated during state transitions.
420	*/
421	while (sta->sta_state > IEEE80211_STA_NONE) {
422	int ret;
423
424	WARN_ON_ONCE(test_sta_flag(sta, WLAN_STA_INSERTED));
425
426	ret = sta_info_move_state(sta, new_state: sta->sta_state - 1);
427	if (WARN_ONCE(ret, "sta_info_move_state() returned %d\n", ret))
428	break;
429	}
430
431	if (sta->rate_ctrl)
432	rate_control_free_sta(sta);
433
434	sta_dbg(sta->sdata, "Destroyed STA %pM\n", sta->sta.addr);
435
436	kfree(objp: to_txq_info(txq: sta->sta.txq[0]));
437	kfree(rcu_dereference_raw(sta->sta.rates));
438	#ifdef CONFIG_MAC80211_MESH
439	kfree(objp: sta->mesh);
440	#endif
441
442	sta_info_free_link(link_sta: &sta->deflink);
443	kfree(objp: sta);
444	}
445
446	static int sta_info_hash_add(struct ieee80211_local *local,
447	struct sta_info *sta)
448	{
449	return rhltable_insert(hlt: &local->sta_hash, list: &sta->hash_node,
450	params: sta_rht_params);
451	}
452
453	static void sta_deliver_ps_frames(struct work_struct *wk)
454	{
455	struct sta_info *sta;
456
457	sta = container_of(wk, struct sta_info, drv_deliver_wk);
458
459	if (sta->dead)
460	return;
461
462	local_bh_disable();
463	if (!test_sta_flag(sta, flag: WLAN_STA_PS_STA))
464	ieee80211_sta_ps_deliver_wakeup(sta);
465	else if (test_and_clear_sta_flag(sta, flag: WLAN_STA_PSPOLL))
466	ieee80211_sta_ps_deliver_poll_response(sta);
467	else if (test_and_clear_sta_flag(sta, flag: WLAN_STA_UAPSD))
468	ieee80211_sta_ps_deliver_uapsd(sta);
469	local_bh_enable();
470	}
471
472	static int sta_prepare_rate_control(struct ieee80211_local *local,
473	struct sta_info *sta, gfp_t gfp)
474	{
475	if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL))
476	return 0;
477
478	sta->rate_ctrl = local->rate_ctrl;
479	sta->rate_ctrl_priv = rate_control_alloc_sta(ref: sta->rate_ctrl,
480	sta, gfp);
481	if (!sta->rate_ctrl_priv)
482	return -ENOMEM;
483
484	return 0;
485	}
486
487	static int sta_info_alloc_link(struct ieee80211_local *local,
488	struct link_sta_info *link_info,
489	gfp_t gfp)
490	{
491	struct ieee80211_hw *hw = &local->hw;
492	int i;
493
494	if (ieee80211_hw_check(hw, USES_RSS)) {
495	link_info->pcpu_rx_stats =
496	alloc_percpu_gfp(struct ieee80211_sta_rx_stats, gfp);
497	if (!link_info->pcpu_rx_stats)
498	return -ENOMEM;
499	}
500
501	link_info->rx_stats.last_rx = jiffies;
502	u64_stats_init(syncp: &link_info->rx_stats.syncp);
503
504	ewma_signal_init(e: &link_info->rx_stats_avg.signal);
505	ewma_avg_signal_init(e: &link_info->status_stats.avg_ack_signal);
506	for (i = 0; i < ARRAY_SIZE(link_info->rx_stats_avg.chain_signal); i++)
507	ewma_signal_init(e: &link_info->rx_stats_avg.chain_signal[i]);
508
509	return 0;
510	}
511
512	static void sta_info_add_link(struct sta_info *sta,
513	unsigned int link_id,
514	struct link_sta_info *link_info,
515	struct ieee80211_link_sta *link_sta)
516	{
517	link_info->sta = sta;
518	link_info->link_id = link_id;
519	link_info->pub = link_sta;
520	link_info->pub->sta = &sta->sta;
521	link_sta->link_id = link_id;
522	rcu_assign_pointer(sta->link[link_id], link_info);
523	rcu_assign_pointer(sta->sta.link[link_id], link_sta);
524
525	link_sta->smps_mode = IEEE80211_SMPS_OFF;
526	link_sta->agg.max_rc_amsdu_len = IEEE80211_MAX_MPDU_LEN_HT_BA;
527	}
528
529	static struct sta_info *
530	__sta_info_alloc(struct ieee80211_sub_if_data *sdata,
531	const u8 *addr, int link_id, const u8 *link_addr,
532	gfp_t gfp)
533	{
534	struct ieee80211_local *local = sdata->local;
535	struct ieee80211_hw *hw = &local->hw;
536	struct sta_info *sta;
537	void *txq_data;
538	int size;
539	int i;
540
541	sta = kzalloc(size: sizeof(*sta) + hw->sta_data_size, flags: gfp);
542	if (!sta)
543	return NULL;
544
545	sta->local = local;
546	sta->sdata = sdata;
547
548	if (sta_info_alloc_link(local, link_info: &sta->deflink, gfp))
549	goto free;
550
551	if (link_id >= 0) {
552	sta_info_add_link(sta, link_id, link_info: &sta->deflink,
553	link_sta: &sta->sta.deflink);
554	sta->sta.valid_links = BIT(link_id);
555	} else {
556	sta_info_add_link(sta, link_id: 0, link_info: &sta->deflink, link_sta: &sta->sta.deflink);
557	}
558
559	sta->sta.cur = &sta->sta.deflink.agg;
560
561	spin_lock_init(&sta->lock);
562	spin_lock_init(&sta->ps_lock);
563	INIT_WORK(&sta->drv_deliver_wk, sta_deliver_ps_frames);
564	wiphy_work_init(work: &sta->ampdu_mlme.work, func: ieee80211_ba_session_work);
565	#ifdef CONFIG_MAC80211_MESH
566	if (ieee80211_vif_is_mesh(vif: &sdata->vif)) {
567	sta->mesh = kzalloc(size: sizeof(*sta->mesh), flags: gfp);
568	if (!sta->mesh)
569	goto free;
570	sta->mesh->plink_sta = sta;
571	spin_lock_init(&sta->mesh->plink_lock);
572	if (!sdata->u.mesh.user_mpm)
573	timer_setup(&sta->mesh->plink_timer, mesh_plink_timer,
574	0);
575	sta->mesh->nonpeer_pm = NL80211_MESH_POWER_ACTIVE;
576	}
577	#endif
578
579	memcpy(sta->addr, addr, ETH_ALEN);
580	memcpy(sta->sta.addr, addr, ETH_ALEN);
581	memcpy(sta->deflink.addr, link_addr, ETH_ALEN);
582	memcpy(sta->sta.deflink.addr, link_addr, ETH_ALEN);
583	sta->sta.max_rx_aggregation_subframes =
584	local->hw.max_rx_aggregation_subframes;
585
586	/* TODO link specific alloc and assignments for MLO Link STA */
587
588	/* Extended Key ID needs to install keys for keyid 0 and 1 Rx-only.
589	* The Tx path starts to use a key as soon as the key slot ptk_idx
590	* references to is not NULL. To not use the initial Rx-only key
591	* prematurely for Tx initialize ptk_idx to an impossible PTK keyid
592	* which always will refer to a NULL key.
593	*/
594	BUILD_BUG_ON(ARRAY_SIZE(sta->ptk) <= INVALID_PTK_KEYIDX);
595	sta->ptk_idx = INVALID_PTK_KEYIDX;
596
597
598	ieee80211_init_frag_cache(cache: &sta->frags);
599
600	sta->sta_state = IEEE80211_STA_NONE;
601
602	if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT)
603	sta->amsdu_mesh_control = -1;
604
605	/* Mark TID as unreserved */
606	sta->reserved_tid = IEEE80211_TID_UNRESERVED;
607
608	sta->last_connected = ktime_get_seconds();
609
610	size = sizeof(struct txq_info) +
611	ALIGN(hw->txq_data_size, sizeof(void *));
612
613	txq_data = kcalloc(ARRAY_SIZE(sta->sta.txq), size, flags: gfp);
614	if (!txq_data)
615	goto free;
616
617	for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
618	struct txq_info *txq = txq_data + i * size;
619
620	/* might not do anything for the (bufferable) MMPDU TXQ */
621	ieee80211_txq_init(sdata, sta, txq, tid: i);
622	}
623
624	if (sta_prepare_rate_control(local, sta, gfp))
625	goto free_txq;
626
627	sta->airtime_weight = IEEE80211_DEFAULT_AIRTIME_WEIGHT;
628
629	for (i = 0; i < IEEE80211_NUM_ACS; i++) {
630	skb_queue_head_init(list: &sta->ps_tx_buf[i]);
631	skb_queue_head_init(list: &sta->tx_filtered[i]);
632	sta->airtime[i].deficit = sta->airtime_weight;
633	atomic_set(v: &sta->airtime[i].aql_tx_pending, i: 0);
634	sta->airtime[i].aql_limit_low = local->aql_txq_limit_low[i];
635	sta->airtime[i].aql_limit_high = local->aql_txq_limit_high[i];
636	}
637
638	for (i = 0; i < IEEE80211_NUM_TIDS; i++)
639	sta->last_seq_ctrl[i] = cpu_to_le16(USHRT_MAX);
640
641	for (i = 0; i < NUM_NL80211_BANDS; i++) {
642	u32 mandatory = 0;
643	int r;
644
645	if (!hw->wiphy->bands[i])
646	continue;
647
648	switch (i) {
649	case NL80211_BAND_2GHZ:
650	case NL80211_BAND_LC:
651	/*
652	* We use both here, even if we cannot really know for
653	* sure the station will support both, but the only use
654	* for this is when we don't know anything yet and send
655	* management frames, and then we'll pick the lowest
656	* possible rate anyway.
657	* If we don't include _G here, we cannot find a rate
658	* in P2P, and thus trigger the WARN_ONCE() in rate.c
659	*/
660	mandatory = IEEE80211_RATE_MANDATORY_B |
661	IEEE80211_RATE_MANDATORY_G;
662	break;
663	case NL80211_BAND_5GHZ:
664	mandatory = IEEE80211_RATE_MANDATORY_A;
665	break;
666	case NL80211_BAND_60GHZ:
667	WARN_ON(1);
668	mandatory = 0;
669	break;
670	}
671
672	for (r = 0; r < hw->wiphy->bands[i]->n_bitrates; r++) {
673	struct ieee80211_rate *rate;
674
675	rate = &hw->wiphy->bands[i]->bitrates[r];
676
677	if (!(rate->flags & mandatory))
678	continue;
679	sta->sta.deflink.supp_rates[i] |= BIT(r);
680	}
681	}
682
683	sta->cparams.ce_threshold = CODEL_DISABLED_THRESHOLD;
684	sta->cparams.target = MS2TIME(20);
685	sta->cparams.interval = MS2TIME(100);
686	sta->cparams.ecn = true;
687	sta->cparams.ce_threshold_selector = 0;
688	sta->cparams.ce_threshold_mask = 0;
689
690	sta_dbg(sdata, "Allocated STA %pM\n", sta->sta.addr);
691
692	return sta;
693
694	free_txq:
695	kfree(objp: to_txq_info(txq: sta->sta.txq[0]));
696	free:
697	sta_info_free_link(link_sta: &sta->deflink);
698	#ifdef CONFIG_MAC80211_MESH
699	kfree(objp: sta->mesh);
700	#endif
701	kfree(objp: sta);
702	return NULL;
703	}
704
705	struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
706	const u8 *addr, gfp_t gfp)
707	{
708	return __sta_info_alloc(sdata, addr, link_id: -1, link_addr: addr, gfp);
709	}
710
711	struct sta_info *sta_info_alloc_with_link(struct ieee80211_sub_if_data *sdata,
712	const u8 *mld_addr,
713	unsigned int link_id,
714	const u8 *link_addr,
715	gfp_t gfp)
716	{
717	return __sta_info_alloc(sdata, addr: mld_addr, link_id, link_addr, gfp);
718	}
719
720	static int sta_info_insert_check(struct sta_info *sta)
721	{
722	struct ieee80211_sub_if_data *sdata = sta->sdata;
723
724	lockdep_assert_wiphy(sdata->local->hw.wiphy);
725
726	/*
727	* Can't be a WARN_ON because it can be triggered through a race:
728	* something inserts a STA (on one CPU) without holding the RTNL
729	* and another CPU turns off the net device.
730	*/
731	if (unlikely(!ieee80211_sdata_running(sdata)))
732	return -ENETDOWN;
733
734	if (WARN_ON(ether_addr_equal(sta->sta.addr, sdata->vif.addr) ||
735	!is_valid_ether_addr(sta->sta.addr)))
736	return -EINVAL;
737
738	/* The RCU read lock is required by rhashtable due to
739	* asynchronous resize/rehash. We also require the mutex
740	* for correctness.
741	*/
742	rcu_read_lock();
743	if (ieee80211_hw_check(&sdata->local->hw, NEEDS_UNIQUE_STA_ADDR) &&
744	ieee80211_find_sta_by_ifaddr(hw: &sdata->local->hw, addr: sta->addr, NULL)) {
745	rcu_read_unlock();
746	return -ENOTUNIQ;
747	}
748	rcu_read_unlock();
749
750	return 0;
751	}
752
753	static int sta_info_insert_drv_state(struct ieee80211_local *local,
754	struct ieee80211_sub_if_data *sdata,
755	struct sta_info *sta)
756	{
757	enum ieee80211_sta_state state;
758	int err = 0;
759
760	for (state = IEEE80211_STA_NOTEXIST; state < sta->sta_state; state++) {
761	err = drv_sta_state(local, sdata, sta, old_state: state, new_state: state + 1);
762	if (err)
763	break;
764	}
765
766	if (!err) {
767	/*
768	* Drivers using legacy sta_add/sta_remove callbacks only
769	* get uploaded set to true after sta_add is called.
770	*/
771	if (!local->ops->sta_add)
772	sta->uploaded = true;
773	return 0;
774	}
775
776	if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
777	sdata_info(sdata,
778	"failed to move IBSS STA %pM to state %d (%d) - keeping it anyway\n",
779	sta->sta.addr, state + 1, err);
780	err = 0;
781	}
782
783	/* unwind on error */
784	for (; state > IEEE80211_STA_NOTEXIST; state--)
785	WARN_ON(drv_sta_state(local, sdata, sta, state, state - 1));
786
787	return err;
788	}
789
790	static void
791	ieee80211_recalc_p2p_go_ps_allowed(struct ieee80211_sub_if_data *sdata)
792	{
793	struct ieee80211_local *local = sdata->local;
794	bool allow_p2p_go_ps = sdata->vif.p2p;
795	struct sta_info *sta;
796
797	rcu_read_lock();
798	list_for_each_entry_rcu(sta, &local->sta_list, list) {
799	if (sdata != sta->sdata ||
800	!test_sta_flag(sta, flag: WLAN_STA_ASSOC))
801	continue;
802	if (!sta->sta.support_p2p_ps) {
803	allow_p2p_go_ps = false;
804	break;
805	}
806	}
807	rcu_read_unlock();
808
809	if (allow_p2p_go_ps != sdata->vif.bss_conf.allow_p2p_go_ps) {
810	sdata->vif.bss_conf.allow_p2p_go_ps = allow_p2p_go_ps;
811	ieee80211_link_info_change_notify(sdata, link: &sdata->deflink,
812	changed: BSS_CHANGED_P2P_PS);
813	}
814	}
815
816	static int sta_info_insert_finish(struct sta_info *sta) __acquires(RCU)
817	{
818	struct ieee80211_local *local = sta->local;
819	struct ieee80211_sub_if_data *sdata = sta->sdata;
820	struct station_info *sinfo = NULL;
821	int err = 0;
822
823	lockdep_assert_wiphy(local->hw.wiphy);
824
825	/* check if STA exists already */
826	if (sta_info_get_bss(sdata, addr: sta->sta.addr)) {
827	err = -EEXIST;
828	goto out_cleanup;
829	}
830
831	sinfo = kzalloc(size: sizeof(struct station_info), GFP_KERNEL);
832	if (!sinfo) {
833	err = -ENOMEM;
834	goto out_cleanup;
835	}
836
837	local->num_sta++;
838	local->sta_generation++;
839	smp_mb();
840
841	/* simplify things and don't accept BA sessions yet */
842	set_sta_flag(sta, flag: WLAN_STA_BLOCK_BA);
843
844	/* make the station visible */
845	err = sta_info_hash_add(local, sta);
846	if (err)
847	goto out_drop_sta;
848
849	if (sta->sta.valid_links) {
850	err = link_sta_info_hash_add(local, link_sta: &sta->deflink);
851	if (err) {
852	sta_info_hash_del(local, sta);
853	goto out_drop_sta;
854	}
855	}
856
857	list_add_tail_rcu(new: &sta->list, head: &local->sta_list);
858
859	/* update channel context before notifying the driver about state
860	* change, this enables driver using the updated channel context right away.
861	*/
862	if (sta->sta_state >= IEEE80211_STA_ASSOC) {
863	ieee80211_recalc_min_chandef(sdata: sta->sdata, link_id: -1);
864	if (!sta->sta.support_p2p_ps)
865	ieee80211_recalc_p2p_go_ps_allowed(sdata: sta->sdata);
866	}
867
868	/* notify driver */
869	err = sta_info_insert_drv_state(local, sdata, sta);
870	if (err)
871	goto out_remove;
872
873	set_sta_flag(sta, flag: WLAN_STA_INSERTED);
874
875	/* accept BA sessions now */
876	clear_sta_flag(sta, flag: WLAN_STA_BLOCK_BA);
877
878	ieee80211_sta_debugfs_add(sta);
879	rate_control_add_sta_debugfs(sta);
880	if (sta->sta.valid_links) {
881	int i;
882
883	for (i = 0; i < ARRAY_SIZE(sta->link); i++) {
884	struct link_sta_info *link_sta;
885
886	link_sta = rcu_dereference_protected(sta->link[i],
887	lockdep_is_held(&local->hw.wiphy->mtx));
888
889	if (!link_sta)
890	continue;
891
892	ieee80211_link_sta_debugfs_add(link_sta);
893	if (sdata->vif.active_links & BIT(i))
894	ieee80211_link_sta_debugfs_drv_add(link_sta);
895	}
896	} else {
897	ieee80211_link_sta_debugfs_add(link_sta: &sta->deflink);
898	ieee80211_link_sta_debugfs_drv_add(link_sta: &sta->deflink);
899	}
900
901	sinfo->generation = local->sta_generation;
902	cfg80211_new_sta(dev: sdata->dev, mac_addr: sta->sta.addr, sinfo, GFP_KERNEL);
903	kfree(objp: sinfo);
904
905	sta_dbg(sdata, "Inserted STA %pM\n", sta->sta.addr);
906
907	/* move reference to rcu-protected */
908	rcu_read_lock();
909
910	if (ieee80211_vif_is_mesh(vif: &sdata->vif))
911	mesh_accept_plinks_update(sdata);
912
913	return 0;
914	out_remove:
915	if (sta->sta.valid_links)
916	link_sta_info_hash_del(local, link_sta: &sta->deflink);
917	sta_info_hash_del(local, sta);
918	list_del_rcu(entry: &sta->list);
919	out_drop_sta:
920	local->num_sta--;
921	synchronize_net();
922	out_cleanup:
923	cleanup_single_sta(sta);
924	kfree(objp: sinfo);
925	rcu_read_lock();
926	return err;
927	}
928
929	int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU)
930	{
931	struct ieee80211_local *local = sta->local;
932	int err;
933
934	might_sleep();
935	lockdep_assert_wiphy(local->hw.wiphy);
936
937	err = sta_info_insert_check(sta);
938	if (err) {
939	sta_info_free(local, sta);
940	rcu_read_lock();
941	return err;
942	}
943
944	return sta_info_insert_finish(sta);
945	}
946
947	int sta_info_insert(struct sta_info *sta)
948	{
949	int err = sta_info_insert_rcu(sta);
950
951	rcu_read_unlock();
952
953	return err;
954	}
955
956	static inline void __bss_tim_set(u8 *tim, u16 id)
957	{
958	/*
959	* This format has been mandated by the IEEE specifications,
960	* so this line may not be changed to use the __set_bit() format.
961	*/
962	tim[id / 8] |= (1 << (id % 8));
963	}
964
965	static inline void __bss_tim_clear(u8 *tim, u16 id)
966	{
967	/*
968	* This format has been mandated by the IEEE specifications,
969	* so this line may not be changed to use the __clear_bit() format.
970	*/
971	tim[id / 8] &= ~(1 << (id % 8));
972	}
973
974	static inline bool __bss_tim_get(u8 *tim, u16 id)
975	{
976	/*
977	* This format has been mandated by the IEEE specifications,
978	* so this line may not be changed to use the test_bit() format.
979	*/
980	return tim[id / 8] & (1 << (id % 8));
981	}
982
983	static unsigned long ieee80211_tids_for_ac(int ac)
984	{
985	/* If we ever support TIDs > 7, this obviously needs to be adjusted */
986	switch (ac) {
987	case IEEE80211_AC_VO:
988	return BIT(6) | BIT(7);
989	case IEEE80211_AC_VI:
990	return BIT(4) | BIT(5);
991	case IEEE80211_AC_BE:
992	return BIT(0) | BIT(3);
993	case IEEE80211_AC_BK:
994	return BIT(1) | BIT(2);
995	default:
996	WARN_ON(1);
997	return 0;
998	}
999	}
1000
1001	static void __sta_info_recalc_tim(struct sta_info *sta, bool ignore_pending)
1002	{
1003	struct ieee80211_local *local = sta->local;
1004	struct ps_data *ps;
1005	bool indicate_tim = false;
1006	u8 ignore_for_tim = sta->sta.uapsd_queues;
1007	int ac;
1008	u16 id = sta->sta.aid;
1009
1010	if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
1011	sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1012	if (WARN_ON_ONCE(!sta->sdata->bss))
1013	return;
1014
1015	ps = &sta->sdata->bss->ps;
1016	#ifdef CONFIG_MAC80211_MESH
1017	} else if (ieee80211_vif_is_mesh(vif: &sta->sdata->vif)) {
1018	ps = &sta->sdata->u.mesh.ps;
1019	#endif
1020	} else {
1021	return;
1022	}
1023
1024	/* No need to do anything if the driver does all */
1025	if (ieee80211_hw_check(&local->hw, AP_LINK_PS) && !local->ops->set_tim)
1026	return;
1027
1028	if (sta->dead)
1029	goto done;
1030
1031	/*
1032	* If all ACs are delivery-enabled then we should build
1033	* the TIM bit for all ACs anyway; if only some are then
1034	* we ignore those and build the TIM bit using only the
1035	* non-enabled ones.
1036	*/
1037	if (ignore_for_tim == BIT(IEEE80211_NUM_ACS) - 1)
1038	ignore_for_tim = 0;
1039
1040	if (ignore_pending)
1041	ignore_for_tim = BIT(IEEE80211_NUM_ACS) - 1;
1042
1043	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1044	unsigned long tids;
1045
1046	if (ignore_for_tim & ieee80211_ac_to_qos_mask[ac])
1047	continue;
1048
1049	indicate_tim |= !skb_queue_empty(list: &sta->tx_filtered[ac]) ||
1050	!skb_queue_empty(list: &sta->ps_tx_buf[ac]);
1051	if (indicate_tim)
1052	break;
1053
1054	tids = ieee80211_tids_for_ac(ac);
1055
1056	indicate_tim |=
1057	sta->driver_buffered_tids & tids;
1058	indicate_tim |=
1059	sta->txq_buffered_tids & tids;
1060	}
1061
1062	done:
1063	spin_lock_bh(lock: &local->tim_lock);
1064
1065	if (indicate_tim == __bss_tim_get(tim: ps->tim, id))
1066	goto out_unlock;
1067
1068	if (indicate_tim)
1069	__bss_tim_set(tim: ps->tim, id);
1070	else
1071	__bss_tim_clear(tim: ps->tim, id);
1072
1073	if (local->ops->set_tim && !WARN_ON(sta->dead)) {
1074	local->tim_in_locked_section = true;
1075	drv_set_tim(local, sta: &sta->sta, set: indicate_tim);
1076	local->tim_in_locked_section = false;
1077	}
1078
1079	out_unlock:
1080	spin_unlock_bh(lock: &local->tim_lock);
1081	}
1082
1083	void sta_info_recalc_tim(struct sta_info *sta)
1084	{
1085	__sta_info_recalc_tim(sta, ignore_pending: false);
1086	}
1087
1088	static bool sta_info_buffer_expired(struct sta_info *sta, struct sk_buff *skb)
1089	{
1090	struct ieee80211_tx_info *info;
1091	int timeout;
1092
1093	if (!skb)
1094	return false;
1095
1096	info = IEEE80211_SKB_CB(skb);
1097
1098	/* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */
1099	timeout = (sta->listen_interval *
1100	sta->sdata->vif.bss_conf.beacon_int *
1101	32 / 15625) * HZ;
1102	if (timeout < STA_TX_BUFFER_EXPIRE)
1103	timeout = STA_TX_BUFFER_EXPIRE;
1104	return time_after(jiffies, info->control.jiffies + timeout);
1105	}
1106
1107
1108	static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local *local,
1109	struct sta_info *sta, int ac)
1110	{
1111	unsigned long flags;
1112	struct sk_buff *skb;
1113
1114	/*
1115	* First check for frames that should expire on the filtered
1116	* queue. Frames here were rejected by the driver and are on
1117	* a separate queue to avoid reordering with normal PS-buffered
1118	* frames. They also aren't accounted for right now in the
1119	* total_ps_buffered counter.
1120	*/
1121	for (;;) {
1122	spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags);
1123	skb = skb_peek(list_: &sta->tx_filtered[ac]);
1124	if (sta_info_buffer_expired(sta, skb))
1125	skb = __skb_dequeue(list: &sta->tx_filtered[ac]);
1126	else
1127	skb = NULL;
1128	spin_unlock_irqrestore(lock: &sta->tx_filtered[ac].lock, flags);
1129
1130	/*
1131	* Frames are queued in order, so if this one
1132	* hasn't expired yet we can stop testing. If
1133	* we actually reached the end of the queue we
1134	* also need to stop, of course.
1135	*/
1136	if (!skb)
1137	break;
1138	ieee80211_free_txskb(hw: &local->hw, skb);
1139	}
1140
1141	/*
1142	* Now also check the normal PS-buffered queue, this will
1143	* only find something if the filtered queue was emptied
1144	* since the filtered frames are all before the normal PS
1145	* buffered frames.
1146	*/
1147	for (;;) {
1148	spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags);
1149	skb = skb_peek(list_: &sta->ps_tx_buf[ac]);
1150	if (sta_info_buffer_expired(sta, skb))
1151	skb = __skb_dequeue(list: &sta->ps_tx_buf[ac]);
1152	else
1153	skb = NULL;
1154	spin_unlock_irqrestore(lock: &sta->ps_tx_buf[ac].lock, flags);
1155
1156	/*
1157	* frames are queued in order, so if this one
1158	* hasn't expired yet (or we reached the end of
1159	* the queue) we can stop testing
1160	*/
1161	if (!skb)
1162	break;
1163
1164	local->total_ps_buffered--;
1165	ps_dbg(sta->sdata, "Buffered frame expired (STA %pM)\n",
1166	sta->sta.addr);
1167	ieee80211_free_txskb(hw: &local->hw, skb);
1168	}
1169
1170	/*
1171	* Finally, recalculate the TIM bit for this station -- it might
1172	* now be clear because the station was too slow to retrieve its
1173	* frames.
1174	*/
1175	sta_info_recalc_tim(sta);
1176
1177	/*
1178	* Return whether there are any frames still buffered, this is
1179	* used to check whether the cleanup timer still needs to run,
1180	* if there are no frames we don't need to rearm the timer.
1181	*/
1182	return !(skb_queue_empty(list: &sta->ps_tx_buf[ac]) &&
1183	skb_queue_empty(list: &sta->tx_filtered[ac]));
1184	}
1185
1186	static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local,
1187	struct sta_info *sta)
1188	{
1189	bool have_buffered = false;
1190	int ac;
1191
1192	/* This is only necessary for stations on BSS/MBSS interfaces */
1193	if (!sta->sdata->bss &&
1194	!ieee80211_vif_is_mesh(vif: &sta->sdata->vif))
1195	return false;
1196
1197	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1198	have_buffered |=
1199	sta_info_cleanup_expire_buffered_ac(local, sta, ac);
1200
1201	return have_buffered;
1202	}
1203
1204	static int __must_check __sta_info_destroy_part1(struct sta_info *sta)
1205	{
1206	struct ieee80211_local *local;
1207	struct ieee80211_sub_if_data *sdata;
1208	int ret, i;
1209
1210	might_sleep();
1211
1212	if (!sta)
1213	return -ENOENT;
1214
1215	local = sta->local;
1216	sdata = sta->sdata;
1217
1218	lockdep_assert_wiphy(local->hw.wiphy);
1219
1220	/*
1221	* Before removing the station from the driver and
1222	* rate control, it might still start new aggregation
1223	* sessions -- block that to make sure the tear-down
1224	* will be sufficient.
1225	*/
1226	set_sta_flag(sta, flag: WLAN_STA_BLOCK_BA);
1227	ieee80211_sta_tear_down_BA_sessions(sta, reason: AGG_STOP_DESTROY_STA);
1228
1229	/*
1230	* Before removing the station from the driver there might be pending
1231	* rx frames on RSS queues sent prior to the disassociation - wait for
1232	* all such frames to be processed.
1233	*/
1234	drv_sync_rx_queues(local, sta);
1235
1236	for (i = 0; i < ARRAY_SIZE(sta->link); i++) {
1237	struct link_sta_info *link_sta;
1238
1239	if (!(sta->sta.valid_links & BIT(i)))
1240	continue;
1241
1242	link_sta = rcu_dereference_protected(sta->link[i],
1243	lockdep_is_held(&local->hw.wiphy->mtx));
1244
1245	link_sta_info_hash_del(local, link_sta);
1246	}
1247
1248	ret = sta_info_hash_del(local, sta);
1249	if (WARN_ON(ret))
1250	return ret;
1251
1252	/*
1253	* for TDLS peers, make sure to return to the base channel before
1254	* removal.
1255	*/
1256	if (test_sta_flag(sta, flag: WLAN_STA_TDLS_OFF_CHANNEL)) {
1257	drv_tdls_cancel_channel_switch(local, sdata, sta: &sta->sta);
1258	clear_sta_flag(sta, flag: WLAN_STA_TDLS_OFF_CHANNEL);
1259	}
1260
1261	list_del_rcu(entry: &sta->list);
1262	sta->removed = true;
1263
1264	if (sta->uploaded)
1265	drv_sta_pre_rcu_remove(local, sdata: sta->sdata, sta);
1266
1267	if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
1268	rcu_access_pointer(sdata->u.vlan.sta) == sta)
1269	RCU_INIT_POINTER(sdata->u.vlan.sta, NULL);
1270
1271	return 0;
1272	}
1273
1274	static int _sta_info_move_state(struct sta_info *sta,
1275	enum ieee80211_sta_state new_state,
1276	bool recalc)
1277	{
1278	struct ieee80211_local *local = sta->local;
1279
1280	might_sleep();
1281
1282	if (sta->sta_state == new_state)
1283	return 0;
1284
1285	/* check allowed transitions first */
1286
1287	switch (new_state) {
1288	case IEEE80211_STA_NONE:
1289	if (sta->sta_state != IEEE80211_STA_AUTH)
1290	return -EINVAL;
1291	break;
1292	case IEEE80211_STA_AUTH:
1293	if (sta->sta_state != IEEE80211_STA_NONE &&
1294	sta->sta_state != IEEE80211_STA_ASSOC)
1295	return -EINVAL;
1296	break;
1297	case IEEE80211_STA_ASSOC:
1298	if (sta->sta_state != IEEE80211_STA_AUTH &&
1299	sta->sta_state != IEEE80211_STA_AUTHORIZED)
1300	return -EINVAL;
1301	break;
1302	case IEEE80211_STA_AUTHORIZED:
1303	if (sta->sta_state != IEEE80211_STA_ASSOC)
1304	return -EINVAL;
1305	break;
1306	default:
1307	WARN(1, "invalid state %d", new_state);
1308	return -EINVAL;
1309	}
1310
1311	sta_dbg(sta->sdata, "moving STA %pM to state %d\n",
1312	sta->sta.addr, new_state);
1313
1314	/* notify the driver before the actual changes so it can
1315	* fail the transition
1316	*/
1317	if (test_sta_flag(sta, flag: WLAN_STA_INSERTED)) {
1318	int err = drv_sta_state(local: sta->local, sdata: sta->sdata, sta,
1319	old_state: sta->sta_state, new_state);
1320	if (err)
1321	return err;
1322	}
1323
1324	/* reflect the change in all state variables */
1325
1326	switch (new_state) {
1327	case IEEE80211_STA_NONE:
1328	if (sta->sta_state == IEEE80211_STA_AUTH)
1329	clear_bit(nr: WLAN_STA_AUTH, addr: &sta->_flags);
1330	break;
1331	case IEEE80211_STA_AUTH:
1332	if (sta->sta_state == IEEE80211_STA_NONE) {
1333	set_bit(nr: WLAN_STA_AUTH, addr: &sta->_flags);
1334	} else if (sta->sta_state == IEEE80211_STA_ASSOC) {
1335	clear_bit(nr: WLAN_STA_ASSOC, addr: &sta->_flags);
1336	if (recalc) {
1337	ieee80211_recalc_min_chandef(sdata: sta->sdata, link_id: -1);
1338	if (!sta->sta.support_p2p_ps)
1339	ieee80211_recalc_p2p_go_ps_allowed(sdata: sta->sdata);
1340	}
1341	}
1342	break;
1343	case IEEE80211_STA_ASSOC:
1344	if (sta->sta_state == IEEE80211_STA_AUTH) {
1345	set_bit(nr: WLAN_STA_ASSOC, addr: &sta->_flags);
1346	sta->assoc_at = ktime_get_boottime_ns();
1347	if (recalc) {
1348	ieee80211_recalc_min_chandef(sdata: sta->sdata, link_id: -1);
1349	if (!sta->sta.support_p2p_ps)
1350	ieee80211_recalc_p2p_go_ps_allowed(sdata: sta->sdata);
1351	}
1352	} else if (sta->sta_state == IEEE80211_STA_AUTHORIZED) {
1353	ieee80211_vif_dec_num_mcast(sdata: sta->sdata);
1354	clear_bit(nr: WLAN_STA_AUTHORIZED, addr: &sta->_flags);
1355
1356	/*
1357	* If we have encryption offload, flush (station) queues
1358	* (after ensuring concurrent TX completed) so we won't
1359	* transmit anything later unencrypted if/when keys are
1360	* also removed, which might otherwise happen depending
1361	* on how the hardware offload works.
1362	*/
1363	if (local->ops->set_key) {
1364	synchronize_net();
1365	if (local->ops->flush_sta)
1366	drv_flush_sta(local, sdata: sta->sdata, sta);
1367	else
1368	ieee80211_flush_queues(local,
1369	sdata: sta->sdata,
1370	drop: false);
1371	}
1372
1373	ieee80211_clear_fast_xmit(sta);
1374	ieee80211_clear_fast_rx(sta);
1375	}
1376	break;
1377	case IEEE80211_STA_AUTHORIZED:
1378	if (sta->sta_state == IEEE80211_STA_ASSOC) {
1379	ieee80211_vif_inc_num_mcast(sdata: sta->sdata);
1380	set_bit(nr: WLAN_STA_AUTHORIZED, addr: &sta->_flags);
1381	ieee80211_check_fast_xmit(sta);
1382	ieee80211_check_fast_rx(sta);
1383	}
1384	if (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1385	sta->sdata->vif.type == NL80211_IFTYPE_AP)
1386	cfg80211_send_layer2_update(dev: sta->sdata->dev,
1387	addr: sta->sta.addr);
1388	break;
1389	default:
1390	break;
1391	}
1392
1393	sta->sta_state = new_state;
1394
1395	return 0;
1396	}
1397
1398	int sta_info_move_state(struct sta_info *sta,
1399	enum ieee80211_sta_state new_state)
1400	{
1401	return _sta_info_move_state(sta, new_state, recalc: true);
1402	}
1403
1404	static void __sta_info_destroy_part2(struct sta_info *sta, bool recalc)
1405	{
1406	struct ieee80211_local *local = sta->local;
1407	struct ieee80211_sub_if_data *sdata = sta->sdata;
1408	struct station_info *sinfo;
1409	int ret;
1410
1411	/*
1412	* NOTE: This assumes at least synchronize_net() was done
1413	* after _part1 and before _part2!
1414	*/
1415
1416	/*
1417	* There's a potential race in _part1 where we set WLAN_STA_BLOCK_BA
1418	* but someone might have just gotten past a check, and not yet into
1419	* queuing the work/creating the data/etc.
1420	*
1421	* Do another round of destruction so that the worker is certainly
1422	* canceled before we later free the station.
1423	*
1424	* Since this is after synchronize_rcu()/synchronize_net() we're now
1425	* certain that nobody can actually hold a reference to the STA and
1426	* be calling e.g. ieee80211_start_tx_ba_session().
1427	*/
1428	ieee80211_sta_tear_down_BA_sessions(sta, reason: AGG_STOP_DESTROY_STA);
1429
1430	might_sleep();
1431	lockdep_assert_wiphy(local->hw.wiphy);
1432
1433	if (sta->sta_state == IEEE80211_STA_AUTHORIZED) {
1434	ret = _sta_info_move_state(sta, new_state: IEEE80211_STA_ASSOC, recalc);
1435	WARN_ON_ONCE(ret);
1436	}
1437
1438	/* now keys can no longer be reached */
1439	ieee80211_free_sta_keys(local, sta);
1440
1441	/* disable TIM bit - last chance to tell driver */
1442	__sta_info_recalc_tim(sta, ignore_pending: true);
1443
1444	sta->dead = true;
1445
1446	local->num_sta--;
1447	local->sta_generation++;
1448
1449	while (sta->sta_state > IEEE80211_STA_NONE) {
1450	ret = _sta_info_move_state(sta, new_state: sta->sta_state - 1, recalc);
1451	if (ret) {
1452	WARN_ON_ONCE(1);
1453	break;
1454	}
1455	}
1456
1457	if (sta->uploaded) {
1458	ret = drv_sta_state(local, sdata, sta, old_state: IEEE80211_STA_NONE,
1459	new_state: IEEE80211_STA_NOTEXIST);
1460	WARN_ON_ONCE(ret != 0);
1461	}
1462
1463	sta_dbg(sdata, "Removed STA %pM\n", sta->sta.addr);
1464
1465	sinfo = kzalloc(size: sizeof(*sinfo), GFP_KERNEL);
1466	if (sinfo)
1467	sta_set_sinfo(sta, sinfo, tidstats: true);
1468	cfg80211_del_sta_sinfo(dev: sdata->dev, mac_addr: sta->sta.addr, sinfo, GFP_KERNEL);
1469	kfree(objp: sinfo);
1470
1471	ieee80211_sta_debugfs_remove(sta);
1472
1473	ieee80211_destroy_frag_cache(cache: &sta->frags);
1474
1475	cleanup_single_sta(sta);
1476	}
1477
1478	int __must_check __sta_info_destroy(struct sta_info *sta)
1479	{
1480	int err = __sta_info_destroy_part1(sta);
1481
1482	if (err)
1483	return err;
1484
1485	synchronize_net();
1486
1487	__sta_info_destroy_part2(sta, recalc: true);
1488
1489	return 0;
1490	}
1491
1492	int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr)
1493	{
1494	struct sta_info *sta;
1495
1496	lockdep_assert_wiphy(sdata->local->hw.wiphy);
1497
1498	sta = sta_info_get(sdata, addr);
1499	return __sta_info_destroy(sta);
1500	}
1501
1502	int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata,
1503	const u8 *addr)
1504	{
1505	struct sta_info *sta;
1506
1507	lockdep_assert_wiphy(sdata->local->hw.wiphy);
1508
1509	sta = sta_info_get_bss(sdata, addr);
1510	return __sta_info_destroy(sta);
1511	}
1512
1513	static void sta_info_cleanup(struct timer_list *t)
1514	{
1515	struct ieee80211_local *local = from_timer(local, t, sta_cleanup);
1516	struct sta_info *sta;
1517	bool timer_needed = false;
1518
1519	rcu_read_lock();
1520	list_for_each_entry_rcu(sta, &local->sta_list, list)
1521	if (sta_info_cleanup_expire_buffered(local, sta))
1522	timer_needed = true;
1523	rcu_read_unlock();
1524
1525	if (local->quiescing)
1526	return;
1527
1528	if (!timer_needed)
1529	return;
1530
1531	mod_timer(timer: &local->sta_cleanup,
1532	expires: round_jiffies(j: jiffies + STA_INFO_CLEANUP_INTERVAL));
1533	}
1534
1535	int sta_info_init(struct ieee80211_local *local)
1536	{
1537	int err;
1538
1539	err = rhltable_init(hlt: &local->sta_hash, params: &sta_rht_params);
1540	if (err)
1541	return err;
1542
1543	err = rhltable_init(hlt: &local->link_sta_hash, params: &link_sta_rht_params);
1544	if (err) {
1545	rhltable_destroy(hlt: &local->sta_hash);
1546	return err;
1547	}
1548
1549	spin_lock_init(&local->tim_lock);
1550	INIT_LIST_HEAD(list: &local->sta_list);
1551
1552	timer_setup(&local->sta_cleanup, sta_info_cleanup, 0);
1553	return 0;
1554	}
1555
1556	void sta_info_stop(struct ieee80211_local *local)
1557	{
1558	del_timer_sync(timer: &local->sta_cleanup);
1559	rhltable_destroy(hlt: &local->sta_hash);
1560	rhltable_destroy(hlt: &local->link_sta_hash);
1561	}
1562
1563
1564	int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans)
1565	{
1566	struct ieee80211_local *local = sdata->local;
1567	struct sta_info *sta, *tmp;
1568	LIST_HEAD(free_list);
1569	int ret = 0;
1570
1571	might_sleep();
1572	lockdep_assert_wiphy(local->hw.wiphy);
1573
1574	WARN_ON(vlans && sdata->vif.type != NL80211_IFTYPE_AP);
1575	WARN_ON(vlans && !sdata->bss);
1576
1577	list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
1578	if (sdata == sta->sdata ||
1579	(vlans && sdata->bss == sta->sdata->bss)) {
1580	if (!WARN_ON(__sta_info_destroy_part1(sta)))
1581	list_add(new: &sta->free_list, head: &free_list);
1582	ret++;
1583	}
1584	}
1585
1586	if (!list_empty(head: &free_list)) {
1587	bool support_p2p_ps = true;
1588
1589	synchronize_net();
1590	list_for_each_entry_safe(sta, tmp, &free_list, free_list) {
1591	if (!sta->sta.support_p2p_ps)
1592	support_p2p_ps = false;
1593	__sta_info_destroy_part2(sta, recalc: false);
1594	}
1595
1596	ieee80211_recalc_min_chandef(sdata, link_id: -1);
1597	if (!support_p2p_ps)
1598	ieee80211_recalc_p2p_go_ps_allowed(sdata);
1599	}
1600
1601	return ret;
1602	}
1603
1604	void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
1605	unsigned long exp_time)
1606	{
1607	struct ieee80211_local *local = sdata->local;
1608	struct sta_info *sta, *tmp;
1609
1610	lockdep_assert_wiphy(local->hw.wiphy);
1611
1612	list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
1613	unsigned long last_active = ieee80211_sta_last_active(sta);
1614
1615	if (sdata != sta->sdata)
1616	continue;
1617
1618	if (time_is_before_jiffies(last_active + exp_time)) {
1619	sta_dbg(sta->sdata, "expiring inactive STA %pM\n",
1620	sta->sta.addr);
1621
1622	if (ieee80211_vif_is_mesh(vif: &sdata->vif) &&
1623	test_sta_flag(sta, flag: WLAN_STA_PS_STA))
1624	atomic_dec(v: &sdata->u.mesh.ps.num_sta_ps);
1625
1626	WARN_ON(__sta_info_destroy(sta));
1627	}
1628	}
1629	}
1630
1631	struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw,
1632	const u8 *addr,
1633	const u8 *localaddr)
1634	{
1635	struct ieee80211_local *local = hw_to_local(hw);
1636	struct rhlist_head *tmp;
1637	struct sta_info *sta;
1638
1639	/*
1640	* Just return a random station if localaddr is NULL
1641	* ... first in list.
1642	*/
1643	for_each_sta_info(local, addr, sta, tmp) {
1644	if (localaddr &&
1645	!ether_addr_equal(addr1: sta->sdata->vif.addr, addr2: localaddr))
1646	continue;
1647	if (!sta->uploaded)
1648	return NULL;
1649	return &sta->sta;
1650	}
1651
1652	return NULL;
1653	}
1654	EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr);
1655
1656	struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif,
1657	const u8 *addr)
1658	{
1659	struct sta_info *sta;
1660
1661	if (!vif)
1662	return NULL;
1663
1664	sta = sta_info_get_bss(sdata: vif_to_sdata(p: vif), addr);
1665	if (!sta)
1666	return NULL;
1667
1668	if (!sta->uploaded)
1669	return NULL;
1670
1671	return &sta->sta;
1672	}
1673	EXPORT_SYMBOL(ieee80211_find_sta);
1674
1675	/* powersave support code */
1676	void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta)
1677	{
1678	struct ieee80211_sub_if_data *sdata = sta->sdata;
1679	struct ieee80211_local *local = sdata->local;
1680	struct sk_buff_head pending;
1681	int filtered = 0, buffered = 0, ac, i;
1682	unsigned long flags;
1683	struct ps_data *ps;
1684
1685	if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1686	sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
1687	u.ap);
1688
1689	if (sdata->vif.type == NL80211_IFTYPE_AP)
1690	ps = &sdata->bss->ps;
1691	else if (ieee80211_vif_is_mesh(vif: &sdata->vif))
1692	ps = &sdata->u.mesh.ps;
1693	else
1694	return;
1695
1696	clear_sta_flag(sta, flag: WLAN_STA_SP);
1697
1698	BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS) > 1);
1699	sta->driver_buffered_tids = 0;
1700	sta->txq_buffered_tids = 0;
1701
1702	if (!ieee80211_hw_check(&local->hw, AP_LINK_PS))
1703	drv_sta_notify(local, sdata, cmd: STA_NOTIFY_AWAKE, sta: &sta->sta);
1704
1705	for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
1706	if (!sta->sta.txq[i] || !txq_has_queue(txq: sta->sta.txq[i]))
1707	continue;
1708
1709	schedule_and_wake_txq(local, txqi: to_txq_info(txq: sta->sta.txq[i]));
1710	}
1711
1712	skb_queue_head_init(list: &pending);
1713
1714	/* sync with ieee80211_tx_h_unicast_ps_buf */
1715	spin_lock(lock: &sta->ps_lock);
1716	/* Send all buffered frames to the station */
1717	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1718	int count = skb_queue_len(list_: &pending), tmp;
1719
1720	spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags);
1721	skb_queue_splice_tail_init(list: &sta->tx_filtered[ac], head: &pending);
1722	spin_unlock_irqrestore(lock: &sta->tx_filtered[ac].lock, flags);
1723	tmp = skb_queue_len(list_: &pending);
1724	filtered += tmp - count;
1725	count = tmp;
1726
1727	spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags);
1728	skb_queue_splice_tail_init(list: &sta->ps_tx_buf[ac], head: &pending);
1729	spin_unlock_irqrestore(lock: &sta->ps_tx_buf[ac].lock, flags);
1730	tmp = skb_queue_len(list_: &pending);
1731	buffered += tmp - count;
1732	}
1733
1734	ieee80211_add_pending_skbs(local, skbs: &pending);
1735
1736	/* now we're no longer in the deliver code */
1737	clear_sta_flag(sta, flag: WLAN_STA_PS_DELIVER);
1738
1739	/* The station might have polled and then woken up before we responded,
1740	* so clear these flags now to avoid them sticking around.
1741	*/
1742	clear_sta_flag(sta, flag: WLAN_STA_PSPOLL);
1743	clear_sta_flag(sta, flag: WLAN_STA_UAPSD);
1744	spin_unlock(lock: &sta->ps_lock);
1745
1746	atomic_dec(v: &ps->num_sta_ps);
1747
1748	local->total_ps_buffered -= buffered;
1749
1750	sta_info_recalc_tim(sta);
1751
1752	ps_dbg(sdata,
1753	"STA %pM aid %d sending %d filtered/%d PS frames since STA woke up\n",
1754	sta->sta.addr, sta->sta.aid, filtered, buffered);
1755
1756	ieee80211_check_fast_xmit(sta);
1757	}
1758
1759	static void ieee80211_send_null_response(struct sta_info *sta, int tid,
1760	enum ieee80211_frame_release_type reason,
1761	bool call_driver, bool more_data)
1762	{
1763	struct ieee80211_sub_if_data *sdata = sta->sdata;
1764	struct ieee80211_local *local = sdata->local;
1765	struct ieee80211_qos_hdr *nullfunc;
1766	struct sk_buff *skb;
1767	int size = sizeof(*nullfunc);
1768	__le16 fc;
1769	bool qos = sta->sta.wme;
1770	struct ieee80211_tx_info *info;
1771	struct ieee80211_chanctx_conf *chanctx_conf;
1772
1773	if (qos) {
1774	fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
1775	IEEE80211_STYPE_QOS_NULLFUNC |
1776	IEEE80211_FCTL_FROMDS);
1777	} else {
1778	size -= 2;
1779	fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
1780	IEEE80211_STYPE_NULLFUNC |
1781	IEEE80211_FCTL_FROMDS);
1782	}
1783
1784	skb = dev_alloc_skb(length: local->hw.extra_tx_headroom + size);
1785	if (!skb)
1786	return;
1787
1788	skb_reserve(skb, len: local->hw.extra_tx_headroom);
1789
1790	nullfunc = skb_put(skb, len: size);
1791	nullfunc->frame_control = fc;
1792	nullfunc->duration_id = 0;
1793	memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN);
1794	memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
1795	memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN);
1796	nullfunc->seq_ctrl = 0;
1797
1798	skb->priority = tid;
1799	skb_set_queue_mapping(skb, queue_mapping: ieee802_1d_to_ac[tid]);
1800	if (qos) {
1801	nullfunc->qos_ctrl = cpu_to_le16(tid);
1802
1803	if (reason == IEEE80211_FRAME_RELEASE_UAPSD) {
1804	nullfunc->qos_ctrl |=
1805	cpu_to_le16(IEEE80211_QOS_CTL_EOSP);
1806	if (more_data)
1807	nullfunc->frame_control |=
1808	cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1809	}
1810	}
1811
1812	info = IEEE80211_SKB_CB(skb);
1813
1814	/*
1815	* Tell TX path to send this frame even though the
1816	* STA may still remain is PS mode after this frame
1817	* exchange. Also set EOSP to indicate this packet
1818	* ends the poll/service period.
1819	*/
1820	info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER |
1821	IEEE80211_TX_STATUS_EOSP |
1822	IEEE80211_TX_CTL_REQ_TX_STATUS;
1823
1824	info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE;
1825
1826	if (call_driver)
1827	drv_allow_buffered_frames(local, sta, BIT(tid), num_frames: 1,
1828	reason, more_data: false);
1829
1830	skb->dev = sdata->dev;
1831
1832	rcu_read_lock();
1833	chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
1834	if (WARN_ON(!chanctx_conf)) {
1835	rcu_read_unlock();
1836	kfree_skb(skb);
1837	return;
1838	}
1839
1840	info->band = chanctx_conf->def.chan->band;
1841	ieee80211_xmit(sdata, sta, skb);
1842	rcu_read_unlock();
1843	}
1844
1845	static int find_highest_prio_tid(unsigned long tids)
1846	{
1847	/* lower 3 TIDs aren't ordered perfectly */
1848	if (tids & 0xF8)
1849	return fls(x: tids) - 1;
1850	/* TID 0 is BE just like TID 3 */
1851	if (tids & BIT(0))
1852	return 0;
1853	return fls(x: tids) - 1;
1854	}
1855
1856	/* Indicates if the MORE_DATA bit should be set in the last
1857	* frame obtained by ieee80211_sta_ps_get_frames.
1858	* Note that driver_release_tids is relevant only if
1859	* reason = IEEE80211_FRAME_RELEASE_PSPOLL
1860	*/
1861	static bool
1862	ieee80211_sta_ps_more_data(struct sta_info *sta, u8 ignored_acs,
1863	enum ieee80211_frame_release_type reason,
1864	unsigned long driver_release_tids)
1865	{
1866	int ac;
1867
1868	/* If the driver has data on more than one TID then
1869	* certainly there's more data if we release just a
1870	* single frame now (from a single TID). This will
1871	* only happen for PS-Poll.
1872	*/
1873	if (reason == IEEE80211_FRAME_RELEASE_PSPOLL &&
1874	hweight16(driver_release_tids) > 1)
1875	return true;
1876
1877	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1878	if (ignored_acs & ieee80211_ac_to_qos_mask[ac])
1879	continue;
1880
1881	if (!skb_queue_empty(list: &sta->tx_filtered[ac]) ||
1882	!skb_queue_empty(list: &sta->ps_tx_buf[ac]))
1883	return true;
1884	}
1885
1886	return false;
1887	}
1888
1889	static void
1890	ieee80211_sta_ps_get_frames(struct sta_info *sta, int n_frames, u8 ignored_acs,
1891	enum ieee80211_frame_release_type reason,
1892	struct sk_buff_head *frames,
1893	unsigned long *driver_release_tids)
1894	{
1895	struct ieee80211_sub_if_data *sdata = sta->sdata;
1896	struct ieee80211_local *local = sdata->local;
1897	int ac;
1898
1899	/* Get response frame(s) and more data bit for the last one. */
1900	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1901	unsigned long tids;
1902
1903	if (ignored_acs & ieee80211_ac_to_qos_mask[ac])
1904	continue;
1905
1906	tids = ieee80211_tids_for_ac(ac);
1907
1908	/* if we already have frames from software, then we can't also
1909	* release from hardware queues
1910	*/
1911	if (skb_queue_empty(list: frames)) {
1912	*driver_release_tids |=
1913	sta->driver_buffered_tids & tids;
1914	*driver_release_tids |= sta->txq_buffered_tids & tids;
1915	}
1916
1917	if (!*driver_release_tids) {
1918	struct sk_buff *skb;
1919
1920	while (n_frames > 0) {
1921	skb = skb_dequeue(list: &sta->tx_filtered[ac]);
1922	if (!skb) {
1923	skb = skb_dequeue(
1924	list: &sta->ps_tx_buf[ac]);
1925	if (skb)
1926	local->total_ps_buffered--;
1927	}
1928	if (!skb)
1929	break;
1930	n_frames--;
1931	__skb_queue_tail(list: frames, newsk: skb);
1932	}
1933	}
1934
1935	/* If we have more frames buffered on this AC, then abort the
1936	* loop since we can't send more data from other ACs before
1937	* the buffered frames from this.
1938	*/
1939	if (!skb_queue_empty(list: &sta->tx_filtered[ac]) ||
1940	!skb_queue_empty(list: &sta->ps_tx_buf[ac]))
1941	break;
1942	}
1943	}
1944
1945	static void
1946	ieee80211_sta_ps_deliver_response(struct sta_info *sta,
1947	int n_frames, u8 ignored_acs,
1948	enum ieee80211_frame_release_type reason)
1949	{
1950	struct ieee80211_sub_if_data *sdata = sta->sdata;
1951	struct ieee80211_local *local = sdata->local;
1952	unsigned long driver_release_tids = 0;
1953	struct sk_buff_head frames;
1954	bool more_data;
1955
1956	/* Service or PS-Poll period starts */
1957	set_sta_flag(sta, flag: WLAN_STA_SP);
1958
1959	__skb_queue_head_init(list: &frames);
1960
1961	ieee80211_sta_ps_get_frames(sta, n_frames, ignored_acs, reason,
1962	frames: &frames, driver_release_tids: &driver_release_tids);
1963
1964	more_data = ieee80211_sta_ps_more_data(sta, ignored_acs, reason, driver_release_tids);
1965
1966	if (driver_release_tids && reason == IEEE80211_FRAME_RELEASE_PSPOLL)
1967	driver_release_tids =
1968	BIT(find_highest_prio_tid(driver_release_tids));
1969
1970	if (skb_queue_empty(list: &frames) && !driver_release_tids) {
1971	int tid, ac;
1972
1973	/*
1974	* For PS-Poll, this can only happen due to a race condition
1975	* when we set the TIM bit and the station notices it, but
1976	* before it can poll for the frame we expire it.
1977	*
1978	* For uAPSD, this is said in the standard (11.2.1.5 h):
1979	* At each unscheduled SP for a non-AP STA, the AP shall
1980	* attempt to transmit at least one MSDU or MMPDU, but no
1981	* more than the value specified in the Max SP Length field
1982	* in the QoS Capability element from delivery-enabled ACs,
1983	* that are destined for the non-AP STA.
1984	*
1985	* Since we have no other MSDU/MMPDU, transmit a QoS null frame.
1986	*/
1987
1988	/* This will evaluate to 1, 3, 5 or 7. */
1989	for (ac = IEEE80211_AC_VO; ac < IEEE80211_NUM_ACS; ac++)
1990	if (!(ignored_acs & ieee80211_ac_to_qos_mask[ac]))
1991	break;
1992	tid = 7 - 2 * ac;
1993
1994	ieee80211_send_null_response(sta, tid, reason, call_driver: true, more_data: false);
1995	} else if (!driver_release_tids) {
1996	struct sk_buff_head pending;
1997	struct sk_buff *skb;
1998	int num = 0;
1999	u16 tids = 0;
2000	bool need_null = false;
2001
2002	skb_queue_head_init(list: &pending);
2003
2004	while ((skb = __skb_dequeue(list: &frames))) {
2005	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2006	struct ieee80211_hdr *hdr = (void *) skb->data;
2007	u8 *qoshdr = NULL;
2008
2009	num++;
2010
2011	/*
2012	* Tell TX path to send this frame even though the
2013	* STA may still remain is PS mode after this frame
2014	* exchange.
2015	*/
2016	info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
2017	info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE;
2018
2019	/*
2020	* Use MoreData flag to indicate whether there are
2021	* more buffered frames for this STA
2022	*/
2023	if (more_data || !skb_queue_empty(list: &frames))
2024	hdr->frame_control |=
2025	cpu_to_le16(IEEE80211_FCTL_MOREDATA);
2026	else
2027	hdr->frame_control &=
2028	cpu_to_le16(~IEEE80211_FCTL_MOREDATA);
2029
2030	if (ieee80211_is_data_qos(fc: hdr->frame_control) ||
2031	ieee80211_is_qos_nullfunc(fc: hdr->frame_control))
2032	qoshdr = ieee80211_get_qos_ctl(hdr);
2033
2034	tids |= BIT(skb->priority);
2035
2036	__skb_queue_tail(list: &pending, newsk: skb);
2037
2038	/* end service period after last frame or add one */
2039	if (!skb_queue_empty(list: &frames))
2040	continue;
2041
2042	if (reason != IEEE80211_FRAME_RELEASE_UAPSD) {
2043	/* for PS-Poll, there's only one frame */
2044	info->flags |= IEEE80211_TX_STATUS_EOSP |
2045	IEEE80211_TX_CTL_REQ_TX_STATUS;
2046	break;
2047	}
2048
2049	/* For uAPSD, things are a bit more complicated. If the
2050	* last frame has a QoS header (i.e. is a QoS-data or
2051	* QoS-nulldata frame) then just set the EOSP bit there
2052	* and be done.
2053	* If the frame doesn't have a QoS header (which means
2054	* it should be a bufferable MMPDU) then we can't set
2055	* the EOSP bit in the QoS header; add a QoS-nulldata
2056	* frame to the list to send it after the MMPDU.
2057	*
2058	* Note that this code is only in the mac80211-release
2059	* code path, we assume that the driver will not buffer
2060	* anything but QoS-data frames, or if it does, will
2061	* create the QoS-nulldata frame by itself if needed.
2062	*
2063	* Cf. 802.11-2012 10.2.1.10 (c).
2064	*/
2065	if (qoshdr) {
2066	*qoshdr |= IEEE80211_QOS_CTL_EOSP;
2067
2068	info->flags |= IEEE80211_TX_STATUS_EOSP |
2069	IEEE80211_TX_CTL_REQ_TX_STATUS;
2070	} else {
2071	/* The standard isn't completely clear on this
2072	* as it says the more-data bit should be set
2073	* if there are more BUs. The QoS-Null frame
2074	* we're about to send isn't buffered yet, we
2075	* only create it below, but let's pretend it
2076	* was buffered just in case some clients only
2077	* expect more-data=0 when eosp=1.
2078	*/
2079	hdr->frame_control |=
2080	cpu_to_le16(IEEE80211_FCTL_MOREDATA);
2081	need_null = true;
2082	num++;
2083	}
2084	break;
2085	}
2086
2087	drv_allow_buffered_frames(local, sta, tids, num_frames: num,
2088	reason, more_data);
2089
2090	ieee80211_add_pending_skbs(local, skbs: &pending);
2091
2092	if (need_null)
2093	ieee80211_send_null_response(
2094	sta, tid: find_highest_prio_tid(tids),
2095	reason, call_driver: false, more_data: false);
2096
2097	sta_info_recalc_tim(sta);
2098	} else {
2099	int tid;
2100
2101	/*
2102	* We need to release a frame that is buffered somewhere in the
2103	* driver ... it'll have to handle that.
2104	* Note that the driver also has to check the number of frames
2105	* on the TIDs we're releasing from - if there are more than
2106	* n_frames it has to set the more-data bit (if we didn't ask
2107	* it to set it anyway due to other buffered frames); if there
2108	* are fewer than n_frames it has to make sure to adjust that
2109	* to allow the service period to end properly.
2110	*/
2111	drv_release_buffered_frames(local, sta, tids: driver_release_tids,
2112	num_frames: n_frames, reason, more_data);
2113
2114	/*
2115	* Note that we don't recalculate the TIM bit here as it would
2116	* most likely have no effect at all unless the driver told us
2117	* that the TID(s) became empty before returning here from the
2118	* release function.
2119	* Either way, however, when the driver tells us that the TID(s)
2120	* became empty or we find that a txq became empty, we'll do the
2121	* TIM recalculation.
2122	*/
2123
2124	for (tid = 0; tid < ARRAY_SIZE(sta->sta.txq); tid++) {
2125	if (!sta->sta.txq[tid] ||
2126	!(driver_release_tids & BIT(tid)) ||
2127	txq_has_queue(txq: sta->sta.txq[tid]))
2128	continue;
2129
2130	sta_info_recalc_tim(sta);
2131	break;
2132	}
2133	}
2134	}
2135
2136	void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta)
2137	{
2138	u8 ignore_for_response = sta->sta.uapsd_queues;
2139
2140	/*
2141	* If all ACs are delivery-enabled then we should reply
2142	* from any of them, if only some are enabled we reply
2143	* only from the non-enabled ones.
2144	*/
2145	if (ignore_for_response == BIT(IEEE80211_NUM_ACS) - 1)
2146	ignore_for_response = 0;
2147
2148	ieee80211_sta_ps_deliver_response(sta, n_frames: 1, ignored_acs: ignore_for_response,
2149	reason: IEEE80211_FRAME_RELEASE_PSPOLL);
2150	}
2151
2152	void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta)
2153	{
2154	int n_frames = sta->sta.max_sp;
2155	u8 delivery_enabled = sta->sta.uapsd_queues;
2156
2157	/*
2158	* If we ever grow support for TSPEC this might happen if
2159	* the TSPEC update from hostapd comes in between a trigger
2160	* frame setting WLAN_STA_UAPSD in the RX path and this
2161	* actually getting called.
2162	*/
2163	if (!delivery_enabled)
2164	return;
2165
2166	switch (sta->sta.max_sp) {
2167	case 1:
2168	n_frames = 2;
2169	break;
2170	case 2:
2171	n_frames = 4;
2172	break;
2173	case 3:
2174	n_frames = 6;
2175	break;
2176	case 0:
2177	/* XXX: what is a good value? */
2178	n_frames = 128;
2179	break;
2180	}
2181
2182	ieee80211_sta_ps_deliver_response(sta, n_frames, ignored_acs: ~delivery_enabled,
2183	reason: IEEE80211_FRAME_RELEASE_UAPSD);
2184	}
2185
2186	void ieee80211_sta_block_awake(struct ieee80211_hw *hw,
2187	struct ieee80211_sta *pubsta, bool block)
2188	{
2189	struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
2190
2191	trace_api_sta_block_awake(local: sta->local, sta: pubsta, block);
2192
2193	if (block) {
2194	set_sta_flag(sta, flag: WLAN_STA_PS_DRIVER);
2195	ieee80211_clear_fast_xmit(sta);
2196	return;
2197	}
2198
2199	if (!test_sta_flag(sta, flag: WLAN_STA_PS_DRIVER))
2200	return;
2201
2202	if (!test_sta_flag(sta, flag: WLAN_STA_PS_STA)) {
2203	set_sta_flag(sta, flag: WLAN_STA_PS_DELIVER);
2204	clear_sta_flag(sta, flag: WLAN_STA_PS_DRIVER);
2205	ieee80211_queue_work(hw, work: &sta->drv_deliver_wk);
2206	} else if (test_sta_flag(sta, flag: WLAN_STA_PSPOLL) ||
2207	test_sta_flag(sta, flag: WLAN_STA_UAPSD)) {
2208	/* must be asleep in this case */
2209	clear_sta_flag(sta, flag: WLAN_STA_PS_DRIVER);
2210	ieee80211_queue_work(hw, work: &sta->drv_deliver_wk);
2211	} else {
2212	clear_sta_flag(sta, flag: WLAN_STA_PS_DRIVER);
2213	ieee80211_check_fast_xmit(sta);
2214	}
2215	}
2216	EXPORT_SYMBOL(ieee80211_sta_block_awake);
2217
2218	void ieee80211_sta_eosp(struct ieee80211_sta *pubsta)
2219	{
2220	struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
2221	struct ieee80211_local *local = sta->local;
2222
2223	trace_api_eosp(local, sta: pubsta);
2224
2225	clear_sta_flag(sta, flag: WLAN_STA_SP);
2226	}
2227	EXPORT_SYMBOL(ieee80211_sta_eosp);
2228
2229	void ieee80211_send_eosp_nullfunc(struct ieee80211_sta *pubsta, int tid)
2230	{
2231	struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
2232	enum ieee80211_frame_release_type reason;
2233	bool more_data;
2234
2235	trace_api_send_eosp_nullfunc(local: sta->local, sta: pubsta, tid);
2236
2237	reason = IEEE80211_FRAME_RELEASE_UAPSD;
2238	more_data = ieee80211_sta_ps_more_data(sta, ignored_acs: ~sta->sta.uapsd_queues,
2239	reason, driver_release_tids: 0);
2240
2241	ieee80211_send_null_response(sta, tid, reason, call_driver: false, more_data);
2242	}
2243	EXPORT_SYMBOL(ieee80211_send_eosp_nullfunc);
2244
2245	void ieee80211_sta_set_buffered(struct ieee80211_sta *pubsta,
2246	u8 tid, bool buffered)
2247	{
2248	struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
2249
2250	if (WARN_ON(tid >= IEEE80211_NUM_TIDS))
2251	return;
2252
2253	trace_api_sta_set_buffered(local: sta->local, sta: pubsta, tid, buffered);
2254
2255	if (buffered)
2256	set_bit(nr: tid, addr: &sta->driver_buffered_tids);
2257	else
2258	clear_bit(nr: tid, addr: &sta->driver_buffered_tids);
2259
2260	sta_info_recalc_tim(sta);
2261	}
2262	EXPORT_SYMBOL(ieee80211_sta_set_buffered);
2263
2264	void ieee80211_sta_register_airtime(struct ieee80211_sta *pubsta, u8 tid,
2265	u32 tx_airtime, u32 rx_airtime)
2266	{
2267	struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
2268	struct ieee80211_local *local = sta->sdata->local;
2269	u8 ac = ieee80211_ac_from_tid(tid);
2270	u32 airtime = 0;
2271	u32 diff;
2272
2273	if (sta->local->airtime_flags & AIRTIME_USE_TX)
2274	airtime += tx_airtime;
2275	if (sta->local->airtime_flags & AIRTIME_USE_RX)
2276	airtime += rx_airtime;
2277
2278	spin_lock_bh(lock: &local->active_txq_lock[ac]);
2279	sta->airtime[ac].tx_airtime += tx_airtime;
2280	sta->airtime[ac].rx_airtime += rx_airtime;
2281
2282	diff = (u32)jiffies - sta->airtime[ac].last_active;
2283	if (diff <= AIRTIME_ACTIVE_DURATION)
2284	sta->airtime[ac].deficit -= airtime;
2285
2286	spin_unlock_bh(lock: &local->active_txq_lock[ac]);
2287	}
2288	EXPORT_SYMBOL(ieee80211_sta_register_airtime);
2289
2290	void __ieee80211_sta_recalc_aggregates(struct sta_info *sta, u16 active_links)
2291	{
2292	bool first = true;
2293	int link_id;
2294
2295	if (!sta->sta.valid_links || !sta->sta.mlo) {
2296	sta->sta.cur = &sta->sta.deflink.agg;
2297	return;
2298	}
2299
2300	rcu_read_lock();
2301	for (link_id = 0; link_id < ARRAY_SIZE((sta)->link); link_id++) {
2302	struct ieee80211_link_sta *link_sta;
2303	int i;
2304
2305	if (!(active_links & BIT(link_id)))
2306	continue;
2307
2308	link_sta = rcu_dereference(sta->sta.link[link_id]);
2309	if (!link_sta)
2310	continue;
2311
2312	if (first) {
2313	sta->cur = sta->sta.deflink.agg;
2314	first = false;
2315	continue;
2316	}
2317
2318	sta->cur.max_amsdu_len =
2319	min(sta->cur.max_amsdu_len,
2320	link_sta->agg.max_amsdu_len);
2321	sta->cur.max_rc_amsdu_len =
2322	min(sta->cur.max_rc_amsdu_len,
2323	link_sta->agg.max_rc_amsdu_len);
2324
2325	for (i = 0; i < ARRAY_SIZE(sta->cur.max_tid_amsdu_len); i++)
2326	sta->cur.max_tid_amsdu_len[i] =
2327	min(sta->cur.max_tid_amsdu_len[i],
2328	link_sta->agg.max_tid_amsdu_len[i]);
2329	}
2330	rcu_read_unlock();
2331
2332	sta->sta.cur = &sta->cur;
2333	}
2334
2335	void ieee80211_sta_recalc_aggregates(struct ieee80211_sta *pubsta)
2336	{
2337	struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
2338
2339	__ieee80211_sta_recalc_aggregates(sta, active_links: sta->sdata->vif.active_links);
2340	}
2341	EXPORT_SYMBOL(ieee80211_sta_recalc_aggregates);
2342
2343	void ieee80211_sta_update_pending_airtime(struct ieee80211_local *local,
2344	struct sta_info *sta, u8 ac,
2345	u16 tx_airtime, bool tx_completed)
2346	{
2347	int tx_pending;
2348
2349	if (!wiphy_ext_feature_isset(wiphy: local->hw.wiphy, ftidx: NL80211_EXT_FEATURE_AQL))
2350	return;
2351
2352	if (!tx_completed) {
2353	if (sta)
2354	atomic_add(i: tx_airtime,
2355	v: &sta->airtime[ac].aql_tx_pending);
2356
2357	atomic_add(i: tx_airtime, v: &local->aql_total_pending_airtime);
2358	atomic_add(i: tx_airtime, v: &local->aql_ac_pending_airtime[ac]);
2359	return;
2360	}
2361
2362	if (sta) {
2363	tx_pending = atomic_sub_return(i: tx_airtime,
2364	v: &sta->airtime[ac].aql_tx_pending);
2365	if (tx_pending < 0)
2366	atomic_cmpxchg(v: &sta->airtime[ac].aql_tx_pending,
2367	old: tx_pending, new: 0);
2368	}
2369
2370	atomic_sub(i: tx_airtime, v: &local->aql_total_pending_airtime);
2371	tx_pending = atomic_sub_return(i: tx_airtime,
2372	v: &local->aql_ac_pending_airtime[ac]);
2373	if (WARN_ONCE(tx_pending < 0,
2374	"Device %s AC %d pending airtime underflow: %u, %u",
2375	wiphy_name(local->hw.wiphy), ac, tx_pending,
2376	tx_airtime)) {
2377	atomic_cmpxchg(v: &local->aql_ac_pending_airtime[ac],
2378	old: tx_pending, new: 0);
2379	atomic_sub(i: tx_pending, v: &local->aql_total_pending_airtime);
2380	}
2381	}
2382
2383	static struct ieee80211_sta_rx_stats *
2384	sta_get_last_rx_stats(struct sta_info *sta)
2385	{
2386	struct ieee80211_sta_rx_stats *stats = &sta->deflink.rx_stats;
2387	int cpu;
2388
2389	if (!sta->deflink.pcpu_rx_stats)
2390	return stats;
2391
2392	for_each_possible_cpu(cpu) {
2393	struct ieee80211_sta_rx_stats *cpustats;
2394
2395	cpustats = per_cpu_ptr(sta->deflink.pcpu_rx_stats, cpu);
2396
2397	if (time_after(cpustats->last_rx, stats->last_rx))
2398	stats = cpustats;
2399	}
2400
2401	return stats;
2402	}
2403
2404	static void sta_stats_decode_rate(struct ieee80211_local *local, u32 rate,
2405	struct rate_info *rinfo)
2406	{
2407	rinfo->bw = STA_STATS_GET(BW, rate);
2408
2409	switch (STA_STATS_GET(TYPE, rate)) {
2410	case STA_STATS_RATE_TYPE_VHT:
2411	rinfo->flags = RATE_INFO_FLAGS_VHT_MCS;
2412	rinfo->mcs = STA_STATS_GET(VHT_MCS, rate);
2413	rinfo->nss = STA_STATS_GET(VHT_NSS, rate);
2414	if (STA_STATS_GET(SGI, rate))
2415	rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
2416	break;
2417	case STA_STATS_RATE_TYPE_HT:
2418	rinfo->flags = RATE_INFO_FLAGS_MCS;
2419	rinfo->mcs = STA_STATS_GET(HT_MCS, rate);
2420	if (STA_STATS_GET(SGI, rate))
2421	rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
2422	break;
2423	case STA_STATS_RATE_TYPE_LEGACY: {
2424	struct ieee80211_supported_band *sband;
2425	u16 brate;
2426	unsigned int shift;
2427	int band = STA_STATS_GET(LEGACY_BAND, rate);
2428	int rate_idx = STA_STATS_GET(LEGACY_IDX, rate);
2429
2430	sband = local->hw.wiphy->bands[band];
2431
2432	if (WARN_ON_ONCE(!sband->bitrates))
2433	break;
2434
2435	brate = sband->bitrates[rate_idx].bitrate;
2436	if (rinfo->bw == RATE_INFO_BW_5)
2437	shift = 2;
2438	else if (rinfo->bw == RATE_INFO_BW_10)
2439	shift = 1;
2440	else
2441	shift = 0;
2442	rinfo->legacy = DIV_ROUND_UP(brate, 1 << shift);
2443	break;
2444	}
2445	case STA_STATS_RATE_TYPE_HE:
2446	rinfo->flags = RATE_INFO_FLAGS_HE_MCS;
2447	rinfo->mcs = STA_STATS_GET(HE_MCS, rate);
2448	rinfo->nss = STA_STATS_GET(HE_NSS, rate);
2449	rinfo->he_gi = STA_STATS_GET(HE_GI, rate);
2450	rinfo->he_ru_alloc = STA_STATS_GET(HE_RU, rate);
2451	rinfo->he_dcm = STA_STATS_GET(HE_DCM, rate);
2452	break;
2453	case STA_STATS_RATE_TYPE_EHT:
2454	rinfo->flags = RATE_INFO_FLAGS_EHT_MCS;
2455	rinfo->mcs = STA_STATS_GET(EHT_MCS, rate);
2456	rinfo->nss = STA_STATS_GET(EHT_NSS, rate);
2457	rinfo->eht_gi = STA_STATS_GET(EHT_GI, rate);
2458	rinfo->eht_ru_alloc = STA_STATS_GET(EHT_RU, rate);
2459	break;
2460	}
2461	}
2462
2463	static int sta_set_rate_info_rx(struct sta_info *sta, struct rate_info *rinfo)
2464	{
2465	u32 rate = READ_ONCE(sta_get_last_rx_stats(sta)->last_rate);
2466
2467	if (rate == STA_STATS_RATE_INVALID)
2468	return -EINVAL;
2469
2470	sta_stats_decode_rate(local: sta->local, rate, rinfo);
2471	return 0;
2472	}
2473
2474	static inline u64 sta_get_tidstats_msdu(struct ieee80211_sta_rx_stats *rxstats,
2475	int tid)
2476	{
2477	unsigned int start;
2478	u64 value;
2479
2480	do {
2481	start = u64_stats_fetch_begin(syncp: &rxstats->syncp);
2482	value = rxstats->msdu[tid];
2483	} while (u64_stats_fetch_retry(syncp: &rxstats->syncp, start));
2484
2485	return value;
2486	}
2487
2488	static void sta_set_tidstats(struct sta_info *sta,
2489	struct cfg80211_tid_stats *tidstats,
2490	int tid)
2491	{
2492	struct ieee80211_local *local = sta->local;
2493	int cpu;
2494
2495	if (!(tidstats->filled & BIT(NL80211_TID_STATS_RX_MSDU))) {
2496	tidstats->rx_msdu += sta_get_tidstats_msdu(rxstats: &sta->deflink.rx_stats,
2497	tid);
2498
2499	if (sta->deflink.pcpu_rx_stats) {
2500	for_each_possible_cpu(cpu) {
2501	struct ieee80211_sta_rx_stats *cpurxs;
2502
2503	cpurxs = per_cpu_ptr(sta->deflink.pcpu_rx_stats,
2504	cpu);
2505	tidstats->rx_msdu +=
2506	sta_get_tidstats_msdu(rxstats: cpurxs, tid);
2507	}
2508	}
2509
2510	tidstats->filled |= BIT(NL80211_TID_STATS_RX_MSDU);
2511	}
2512
2513	if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU))) {
2514	tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU);
2515	tidstats->tx_msdu = sta->deflink.tx_stats.msdu[tid];
2516	}
2517
2518	if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU_RETRIES)) &&
2519	ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
2520	tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU_RETRIES);
2521	tidstats->tx_msdu_retries = sta->deflink.status_stats.msdu_retries[tid];
2522	}
2523
2524	if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU_FAILED)) &&
2525	ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
2526	tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU_FAILED);
2527	tidstats->tx_msdu_failed = sta->deflink.status_stats.msdu_failed[tid];
2528	}
2529
2530	if (tid < IEEE80211_NUM_TIDS) {
2531	spin_lock_bh(lock: &local->fq.lock);
2532	rcu_read_lock();
2533
2534	tidstats->filled |= BIT(NL80211_TID_STATS_TXQ_STATS);
2535	ieee80211_fill_txq_stats(txqstats: &tidstats->txq_stats,
2536	txqi: to_txq_info(txq: sta->sta.txq[tid]));
2537
2538	rcu_read_unlock();
2539	spin_unlock_bh(lock: &local->fq.lock);
2540	}
2541	}
2542
2543	static inline u64 sta_get_stats_bytes(struct ieee80211_sta_rx_stats *rxstats)
2544	{
2545	unsigned int start;
2546	u64 value;
2547
2548	do {
2549	start = u64_stats_fetch_begin(syncp: &rxstats->syncp);
2550	value = rxstats->bytes;
2551	} while (u64_stats_fetch_retry(syncp: &rxstats->syncp, start));
2552
2553	return value;
2554	}
2555
2556	void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo,
2557	bool tidstats)
2558	{
2559	struct ieee80211_sub_if_data *sdata = sta->sdata;
2560	struct ieee80211_local *local = sdata->local;
2561	u32 thr = 0;
2562	int i, ac, cpu;
2563	struct ieee80211_sta_rx_stats *last_rxstats;
2564
2565	last_rxstats = sta_get_last_rx_stats(sta);
2566
2567	sinfo->generation = sdata->local->sta_generation;
2568
2569	/* do before driver, so beacon filtering drivers have a
2570	* chance to e.g. just add the number of filtered beacons
2571	* (or just modify the value entirely, of course)
2572	*/
2573	if (sdata->vif.type == NL80211_IFTYPE_STATION)
2574	sinfo->rx_beacon = sdata->deflink.u.mgd.count_beacon_signal;
2575
2576	drv_sta_statistics(local, sdata, sta: &sta->sta, sinfo);
2577	sinfo->filled |= BIT_ULL(NL80211_STA_INFO_INACTIVE_TIME) |
2578	BIT_ULL(NL80211_STA_INFO_STA_FLAGS) |
2579	BIT_ULL(NL80211_STA_INFO_BSS_PARAM) |
2580	BIT_ULL(NL80211_STA_INFO_CONNECTED_TIME) |
2581	BIT_ULL(NL80211_STA_INFO_ASSOC_AT_BOOTTIME) |
2582	BIT_ULL(NL80211_STA_INFO_RX_DROP_MISC);
2583
2584	if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2585	sinfo->beacon_loss_count =
2586	sdata->deflink.u.mgd.beacon_loss_count;
2587	sinfo->filled |= BIT_ULL(NL80211_STA_INFO_BEACON_LOSS);
2588	}
2589
2590	sinfo->connected_time = ktime_get_seconds() - sta->last_connected;
2591	sinfo->assoc_at = sta->assoc_at;
2592	sinfo->inactive_time =
2593	jiffies_to_msecs(j: jiffies - ieee80211_sta_last_active(sta));
2594
2595	if (!(sinfo->filled & (BIT_ULL(NL80211_STA_INFO_TX_BYTES64) |
2596	BIT_ULL(NL80211_STA_INFO_TX_BYTES)))) {
2597	sinfo->tx_bytes = 0;
2598	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2599	sinfo->tx_bytes += sta->deflink.tx_stats.bytes[ac];
2600	sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_BYTES64);
2601	}
2602
2603	if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_PACKETS))) {
2604	sinfo->tx_packets = 0;
2605	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2606	sinfo->tx_packets += sta->deflink.tx_stats.packets[ac];
2607	sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_PACKETS);
2608	}
2609
2610	if (!(sinfo->filled & (BIT_ULL(NL80211_STA_INFO_RX_BYTES64) |
2611	BIT_ULL(NL80211_STA_INFO_RX_BYTES)))) {
2612	sinfo->rx_bytes += sta_get_stats_bytes(rxstats: &sta->deflink.rx_stats);
2613
2614	if (sta->deflink.pcpu_rx_stats) {
2615	for_each_possible_cpu(cpu) {
2616	struct ieee80211_sta_rx_stats *cpurxs;
2617
2618	cpurxs = per_cpu_ptr(sta->deflink.pcpu_rx_stats,
2619	cpu);
2620	sinfo->rx_bytes += sta_get_stats_bytes(rxstats: cpurxs);
2621	}
2622	}
2623
2624	sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_BYTES64);
2625	}
2626
2627	if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_RX_PACKETS))) {
2628	sinfo->rx_packets = sta->deflink.rx_stats.packets;
2629	if (sta->deflink.pcpu_rx_stats) {
2630	for_each_possible_cpu(cpu) {
2631	struct ieee80211_sta_rx_stats *cpurxs;
2632
2633	cpurxs = per_cpu_ptr(sta->deflink.pcpu_rx_stats,
2634	cpu);
2635	sinfo->rx_packets += cpurxs->packets;
2636	}
2637	}
2638	sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_PACKETS);
2639	}
2640
2641	if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_RETRIES))) {
2642	sinfo->tx_retries = sta->deflink.status_stats.retry_count;
2643	sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_RETRIES);
2644	}
2645
2646	if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_FAILED))) {
2647	sinfo->tx_failed = sta->deflink.status_stats.retry_failed;
2648	sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_FAILED);
2649	}
2650
2651	if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_RX_DURATION))) {
2652	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2653	sinfo->rx_duration += sta->airtime[ac].rx_airtime;
2654	sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_DURATION);
2655	}
2656
2657	if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_DURATION))) {
2658	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2659	sinfo->tx_duration += sta->airtime[ac].tx_airtime;
2660	sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_DURATION);
2661	}
2662
2663	if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_AIRTIME_WEIGHT))) {
2664	sinfo->airtime_weight = sta->airtime_weight;
2665	sinfo->filled |= BIT_ULL(NL80211_STA_INFO_AIRTIME_WEIGHT);
2666	}
2667
2668	sinfo->rx_dropped_misc = sta->deflink.rx_stats.dropped;
2669	if (sta->deflink.pcpu_rx_stats) {
2670	for_each_possible_cpu(cpu) {
2671	struct ieee80211_sta_rx_stats *cpurxs;
2672
2673	cpurxs = per_cpu_ptr(sta->deflink.pcpu_rx_stats, cpu);
2674	sinfo->rx_dropped_misc += cpurxs->dropped;
2675	}
2676	}
2677
2678	if (sdata->vif.type == NL80211_IFTYPE_STATION &&
2679	!(sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)) {
2680	sinfo->filled |= BIT_ULL(NL80211_STA_INFO_BEACON_RX) |
2681	BIT_ULL(NL80211_STA_INFO_BEACON_SIGNAL_AVG);
2682	sinfo->rx_beacon_signal_avg = ieee80211_ave_rssi(vif: &sdata->vif);
2683	}
2684
2685	if (ieee80211_hw_check(&sta->local->hw, SIGNAL_DBM) ||
2686	ieee80211_hw_check(&sta->local->hw, SIGNAL_UNSPEC)) {
2687	if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_SIGNAL))) {
2688	sinfo->signal = (s8)last_rxstats->last_signal;
2689	sinfo->filled |= BIT_ULL(NL80211_STA_INFO_SIGNAL);
2690	}
2691
2692	if (!sta->deflink.pcpu_rx_stats &&
2693	!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_SIGNAL_AVG))) {
2694	sinfo->signal_avg =
2695	-ewma_signal_read(e: &sta->deflink.rx_stats_avg.signal);
2696	sinfo->filled |= BIT_ULL(NL80211_STA_INFO_SIGNAL_AVG);
2697	}
2698	}
2699
2700	/* for the average - if pcpu_rx_stats isn't set - rxstats must point to
2701	* the sta->rx_stats struct, so the check here is fine with and without
2702	* pcpu statistics
2703	*/
2704	if (last_rxstats->chains &&
2705	!(sinfo->filled & (BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL) |
2706	BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)))) {
2707	sinfo->filled |= BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL);
2708	if (!sta->deflink.pcpu_rx_stats)
2709	sinfo->filled |= BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL_AVG);
2710
2711	sinfo->chains = last_rxstats->chains;
2712
2713	for (i = 0; i < ARRAY_SIZE(sinfo->chain_signal); i++) {
2714	sinfo->chain_signal[i] =
2715	last_rxstats->chain_signal_last[i];
2716	sinfo->chain_signal_avg[i] =
2717	-ewma_signal_read(e: &sta->deflink.rx_stats_avg.chain_signal[i]);
2718	}
2719	}
2720
2721	if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_BITRATE)) &&
2722	!sta->sta.valid_links &&
2723	ieee80211_rate_valid(rate: &sta->deflink.tx_stats.last_rate)) {
2724	sta_set_rate_info_tx(sta, rate: &sta->deflink.tx_stats.last_rate,
2725	rinfo: &sinfo->txrate);
2726	sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_BITRATE);
2727	}
2728
2729	if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_RX_BITRATE)) &&
2730	!sta->sta.valid_links) {
2731	if (sta_set_rate_info_rx(sta, rinfo: &sinfo->rxrate) == 0)
2732	sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_BITRATE);
2733	}
2734
2735	if (tidstats && !cfg80211_sinfo_alloc_tid_stats(sinfo, GFP_KERNEL)) {
2736	for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++)
2737	sta_set_tidstats(sta, tidstats: &sinfo->pertid[i], tid: i);
2738	}
2739
2740	if (ieee80211_vif_is_mesh(vif: &sdata->vif)) {
2741	#ifdef CONFIG_MAC80211_MESH
2742	sinfo->filled |= BIT_ULL(NL80211_STA_INFO_LLID) |
2743	BIT_ULL(NL80211_STA_INFO_PLID) |
2744	BIT_ULL(NL80211_STA_INFO_PLINK_STATE) |
2745	BIT_ULL(NL80211_STA_INFO_LOCAL_PM) |
2746	BIT_ULL(NL80211_STA_INFO_PEER_PM) |
2747	BIT_ULL(NL80211_STA_INFO_NONPEER_PM) |
2748	BIT_ULL(NL80211_STA_INFO_CONNECTED_TO_GATE) |
2749	BIT_ULL(NL80211_STA_INFO_CONNECTED_TO_AS);
2750
2751	sinfo->llid = sta->mesh->llid;
2752	sinfo->plid = sta->mesh->plid;
2753	sinfo->plink_state = sta->mesh->plink_state;
2754	if (test_sta_flag(sta, flag: WLAN_STA_TOFFSET_KNOWN)) {
2755	sinfo->filled |= BIT_ULL(NL80211_STA_INFO_T_OFFSET);
2756	sinfo->t_offset = sta->mesh->t_offset;
2757	}
2758	sinfo->local_pm = sta->mesh->local_pm;
2759	sinfo->peer_pm = sta->mesh->peer_pm;
2760	sinfo->nonpeer_pm = sta->mesh->nonpeer_pm;
2761	sinfo->connected_to_gate = sta->mesh->connected_to_gate;
2762	sinfo->connected_to_as = sta->mesh->connected_to_as;
2763	#endif
2764	}
2765
2766	sinfo->bss_param.flags = 0;
2767	if (sdata->vif.bss_conf.use_cts_prot)
2768	sinfo->bss_param.flags |= BSS_PARAM_FLAGS_CTS_PROT;
2769	if (sdata->vif.bss_conf.use_short_preamble)
2770	sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_PREAMBLE;
2771	if (sdata->vif.bss_conf.use_short_slot)
2772	sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_SLOT_TIME;
2773	sinfo->bss_param.dtim_period = sdata->vif.bss_conf.dtim_period;
2774	sinfo->bss_param.beacon_interval = sdata->vif.bss_conf.beacon_int;
2775
2776	sinfo->sta_flags.set = 0;
2777	sinfo->sta_flags.mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2778	BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2779	BIT(NL80211_STA_FLAG_WME) |
2780	BIT(NL80211_STA_FLAG_MFP) |
2781	BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2782	BIT(NL80211_STA_FLAG_ASSOCIATED) |
2783	BIT(NL80211_STA_FLAG_TDLS_PEER);
2784	if (test_sta_flag(sta, flag: WLAN_STA_AUTHORIZED))
2785	sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHORIZED);
2786	if (test_sta_flag(sta, flag: WLAN_STA_SHORT_PREAMBLE))
2787	sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
2788	if (sta->sta.wme)
2789	sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_WME);
2790	if (test_sta_flag(sta, flag: WLAN_STA_MFP))
2791	sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_MFP);
2792	if (test_sta_flag(sta, flag: WLAN_STA_AUTH))
2793	sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHENTICATED);
2794	if (test_sta_flag(sta, flag: WLAN_STA_ASSOC))
2795	sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_ASSOCIATED);
2796	if (test_sta_flag(sta, flag: WLAN_STA_TDLS_PEER))
2797	sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_TDLS_PEER);
2798
2799	thr = sta_get_expected_throughput(sta);
2800
2801	if (thr != 0) {
2802	sinfo->filled |= BIT_ULL(NL80211_STA_INFO_EXPECTED_THROUGHPUT);
2803	sinfo->expected_throughput = thr;
2804	}
2805
2806	if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL)) &&
2807	sta->deflink.status_stats.ack_signal_filled) {
2808	sinfo->ack_signal = sta->deflink.status_stats.last_ack_signal;
2809	sinfo->filled |= BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL);
2810	}
2811
2812	if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL_AVG)) &&
2813	sta->deflink.status_stats.ack_signal_filled) {
2814	sinfo->avg_ack_signal =
2815	-(s8)ewma_avg_signal_read(
2816	e: &sta->deflink.status_stats.avg_ack_signal);
2817	sinfo->filled |=
2818	BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL_AVG);
2819	}
2820
2821	if (ieee80211_vif_is_mesh(vif: &sdata->vif)) {
2822	sinfo->filled |= BIT_ULL(NL80211_STA_INFO_AIRTIME_LINK_METRIC);
2823	sinfo->airtime_link_metric =
2824	airtime_link_metric_get(local, sta);
2825	}
2826	}
2827
2828	u32 sta_get_expected_throughput(struct sta_info *sta)
2829	{
2830	struct ieee80211_sub_if_data *sdata = sta->sdata;
2831	struct ieee80211_local *local = sdata->local;
2832	struct rate_control_ref *ref = NULL;
2833	u32 thr = 0;
2834
2835	if (test_sta_flag(sta, flag: WLAN_STA_RATE_CONTROL))
2836	ref = local->rate_ctrl;
2837
2838	/* check if the driver has a SW RC implementation */
2839	if (ref && ref->ops->get_expected_throughput)
2840	thr = ref->ops->get_expected_throughput(sta->rate_ctrl_priv);
2841	else
2842	thr = drv_get_expected_throughput(local, sta);
2843
2844	return thr;
2845	}
2846
2847	unsigned long ieee80211_sta_last_active(struct sta_info *sta)
2848	{
2849	struct ieee80211_sta_rx_stats *stats = sta_get_last_rx_stats(sta);
2850
2851	if (!sta->deflink.status_stats.last_ack ||
2852	time_after(stats->last_rx, sta->deflink.status_stats.last_ack))
2853	return stats->last_rx;
2854	return sta->deflink.status_stats.last_ack;
2855	}
2856
2857	static void sta_update_codel_params(struct sta_info *sta, u32 thr)
2858	{
2859	if (thr && thr < STA_SLOW_THRESHOLD * sta->local->num_sta) {
2860	sta->cparams.target = MS2TIME(50);
2861	sta->cparams.interval = MS2TIME(300);
2862	sta->cparams.ecn = false;
2863	} else {
2864	sta->cparams.target = MS2TIME(20);
2865	sta->cparams.interval = MS2TIME(100);
2866	sta->cparams.ecn = true;
2867	}
2868	}
2869
2870	void ieee80211_sta_set_expected_throughput(struct ieee80211_sta *pubsta,
2871	u32 thr)
2872	{
2873	struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
2874
2875	sta_update_codel_params(sta, thr);
2876	}
2877
2878	int ieee80211_sta_allocate_link(struct sta_info *sta, unsigned int link_id)
2879	{
2880	struct ieee80211_sub_if_data *sdata = sta->sdata;
2881	struct sta_link_alloc *alloc;
2882	int ret;
2883
2884	lockdep_assert_wiphy(sdata->local->hw.wiphy);
2885
2886	WARN_ON(!test_sta_flag(sta, WLAN_STA_INSERTED));
2887
2888	/* must represent an MLD from the start */
2889	if (WARN_ON(!sta->sta.valid_links))
2890	return -EINVAL;
2891
2892	if (WARN_ON(sta->sta.valid_links & BIT(link_id) ||
2893	sta->link[link_id]))
2894	return -EBUSY;
2895
2896	alloc = kzalloc(size: sizeof(*alloc), GFP_KERNEL);
2897	if (!alloc)
2898	return -ENOMEM;
2899
2900	ret = sta_info_alloc_link(local: sdata->local, link_info: &alloc->info, GFP_KERNEL);
2901	if (ret) {
2902	kfree(objp: alloc);
2903	return ret;
2904	}
2905
2906	sta_info_add_link(sta, link_id, link_info: &alloc->info, link_sta: &alloc->sta);
2907
2908	ieee80211_link_sta_debugfs_add(link_sta: &alloc->info);
2909
2910	return 0;
2911	}
2912
2913	void ieee80211_sta_free_link(struct sta_info *sta, unsigned int link_id)
2914	{
2915	lockdep_assert_wiphy(sta->sdata->local->hw.wiphy);
2916
2917	WARN_ON(!test_sta_flag(sta, WLAN_STA_INSERTED));
2918
2919	sta_remove_link(sta, link_id, unhash: false);
2920	}
2921
2922	int ieee80211_sta_activate_link(struct sta_info *sta, unsigned int link_id)
2923	{
2924	struct ieee80211_sub_if_data *sdata = sta->sdata;
2925	struct link_sta_info *link_sta;
2926	u16 old_links = sta->sta.valid_links;
2927	u16 new_links = old_links | BIT(link_id);
2928	int ret;
2929
2930	link_sta = rcu_dereference_protected(sta->link[link_id],
2931	lockdep_is_held(&sdata->local->hw.wiphy->mtx));
2932
2933	if (WARN_ON(old_links == new_links || !link_sta))
2934	return -EINVAL;
2935
2936	rcu_read_lock();
2937	if (link_sta_info_hash_lookup(local: sdata->local, addr: link_sta->addr)) {
2938	rcu_read_unlock();
2939	return -EALREADY;
2940	}
2941	/* we only modify under the mutex so this is fine */
2942	rcu_read_unlock();
2943
2944	sta->sta.valid_links = new_links;
2945
2946	if (WARN_ON(!test_sta_flag(sta, WLAN_STA_INSERTED)))
2947	goto hash;
2948
2949	ieee80211_recalc_min_chandef(sdata, link_id);
2950
2951	/* Ensure the values are updated for the driver,
2952	* redone by sta_remove_link on failure.
2953	*/
2954	ieee80211_sta_recalc_aggregates(&sta->sta);
2955
2956	ret = drv_change_sta_links(local: sdata->local, sdata, sta: &sta->sta,
2957	old_links, new_links);
2958	if (ret) {
2959	sta->sta.valid_links = old_links;
2960	sta_remove_link(sta, link_id, unhash: false);
2961	return ret;
2962	}
2963
2964	hash:
2965	ret = link_sta_info_hash_add(local: sdata->local, link_sta);
2966	WARN_ON(ret);
2967	return 0;
2968	}
2969
2970	void ieee80211_sta_remove_link(struct sta_info *sta, unsigned int link_id)
2971	{
2972	struct ieee80211_sub_if_data *sdata = sta->sdata;
2973	u16 old_links = sta->sta.valid_links;
2974
2975	lockdep_assert_wiphy(sdata->local->hw.wiphy);
2976
2977	sta->sta.valid_links &= ~BIT(link_id);
2978
2979	if (!WARN_ON(!test_sta_flag(sta, WLAN_STA_INSERTED)))
2980	drv_change_sta_links(local: sdata->local, sdata, sta: &sta->sta,
2981	old_links, new_links: sta->sta.valid_links);
2982
2983	sta_remove_link(sta, link_id, unhash: true);
2984	}
2985
2986	void ieee80211_sta_set_max_amsdu_subframes(struct sta_info *sta,
2987	const u8 *ext_capab,
2988	unsigned int ext_capab_len)
2989	{
2990	u8 val;
2991
2992	sta->sta.max_amsdu_subframes = 0;
2993
2994	if (ext_capab_len < 8)
2995	return;
2996
2997	/* The sender might not have sent the last bit, consider it to be 0 */
2998	val = u8_get_bits(v: ext_capab[7], WLAN_EXT_CAPA8_MAX_MSDU_IN_AMSDU_LSB);
2999
3000	/* we did get all the bits, take the MSB as well */
3001	if (ext_capab_len >= 9)
3002	val |= u8_get_bits(v: ext_capab[8],
3003	WLAN_EXT_CAPA9_MAX_MSDU_IN_AMSDU_MSB) << 1;
3004
3005	if (val)
3006	sta->sta.max_amsdu_subframes = 4 << (4 - val);
3007	}
3008
3009	#ifdef CONFIG_LOCKDEP
3010	bool lockdep_sta_mutex_held(struct ieee80211_sta *pubsta)
3011	{
3012	struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
3013
3014	return lockdep_is_held(&sta->local->hw.wiphy->mtx);
3015	}
3016	EXPORT_SYMBOL(lockdep_sta_mutex_held);
3017	#endif
3018